As we all know, the Snapdragon 810 processor in our OnePlus 2 phones is prone to overheat, especially during heavy tasks such as gaming. With the stock kernel (which probably most of you are using) this leads to the A57 cores being partially or fully shut down and the display - which generates additional heat - being dimmed in order for the phone to keep a healthy temperature (healthy for both its components and the hands that are holding it.) This, in turn, leads to lag when playing especially demanding games. Which in turn leads to a frustrated user.
With root access, it's possible to use custom kernels and/or custom thermal throttling profiles in order to (at least partially) circumvent these issues, by throttling the CPU frequency and/or limiting the number of active cores, using different schedulers and governors, and by applying thermal profiles that allow the phone to get hotter (in order to keep higher CPU frequencies for a longer duration).
Since I bought the OPT, I was playing a very power hungry game - Republique - which, at its highest graphics quality setting, pushes the phone to its limits. I quickly switched from the stock kernel to the Boeffla kernel and started experimenting with schedulers, governors, hotplugging settings, CPU/GPU frequencies and thermal profiles, but nothing I have done so far makes it possible to play the game for more than 15-20 minutes before some kind of throttling / heat control sets in and the game starts lagging.
I tried limiting both CPU clusters to only 2 cores while maintaining higher frequencies, I tried throttling the frequencies and keeping all 8 cores active, and I tried all kinds of solutions in-between with anything from 4-8 cores active and frequencies anywhere between 60% and 100%. I also tried the various thermal profiles that the kernel offers. But whatever I did, the game was either lagging right from the start, or running smoothly for about 15 minutes before the screen was dimmed and the CPU was throttled, leading to a laggy experience.
So my question is, what do you guys do to keep the OnePlus 2 from overheating during gaming, while at the same time maintaining a lag-free experience? I don't seem to get anywhere with anything I try, so I'd be extremely grateful for some useful input.
vonotny said:
As we all know, the Snapdragon 810 processor in our OnePlus 2 phones is prone to overheat, especially during heavy tasks such as gaming. With the stock kernel (which probably most of you are using) this leads to the A57 cores being partially or fully shut down and the display - which generates additional heat - being dimmed in order for the phone to keep a healthy temperature (healthy for both its components and the hands that are holding it.) This, in turn, leads to lag when playing especially demanding games. Which in turn leads to a frustrated user.
With root access, it's possible to use custom kernels and/or custom thermal throttling profiles in order to (at least partially) circumvent these issues, by throttling the CPU frequency and/or limiting the number of active cores, using different schedulers and governors, and by applying thermal profiles that allow the phone to get hotter (in order to keep higher CPU frequencies for a longer duration).
Since I bought the OPT, I was playing a very power hungry game - Republique - which, at its highest graphics quality setting, pushes the phone to its limits. I quickly switched from the stock kernel to the Boeffla kernel and started experimenting with schedulers, governors, hotplugging settings, CPU/GPU frequencies and thermal profiles, but nothing I have done so far makes it possible to play the game for more than 15-20 minutes before some kind of throttling / heat control sets in and the game starts lagging.
I tried limiting both CPU clusters to only 2 cores while maintaining higher frequencies, I tried throttling the frequencies and keeping all 8 cores active, and I tried all kinds of solutions in-between with anything from 4-8 cores active and frequencies anywhere between 60% and 100%. I also tried the various thermal profiles that the kernel offers. But whatever I did, the game was either lagging right from the start, or running smoothly for about 15 minutes before the screen was dimmed and the CPU was throttled, leading to a laggy experience.
So my question is, what do you guys do to keep the OnePlus 2 from overheating during gaming, while at the same time maintaining a lag-free experience? I don't seem to get anywhere with anything I try, so I'd be extremely grateful for some useful input.
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All the phones throttle while gaming. I use thermal extreme with boeffla kernel. And use 2 a53 at 1,3ghz and 2-4 a57 at 1,4ghz and I modified the throttle file and it underclock to 1,2ghz when it gets hot but it doesn't happen if you don't play longer than 30minutes and it doesn't lag either. You can leave stock settings but if course it will get hot quicker. Also with thermal hotplugged or something like that, I used it all cores online all the time at full speed and it doesn't throttle for a long time, so I don't know what overheating are you talking about. My nexus 5 throttle faster and disable 2 of 4 cores and leave the other 2 at half speed, and our processor overheats?. Oneplus throttle the device a lot because of the rumors, fortunately we can change that. Try what I said, cheers.
Sent from my ONE A2005 using Tapatalk
Migdilu said:
All the phones throttle while gaming. I use thermal extreme with boeffla kernel. And use 2 a53 at 1,3ghz and 2-4 a57 at 1,4ghz and I modified the throttle file and it underclock to 1,2ghz when it gets hot but it doesn't happen if you don't play longer than 30minutes and it doesn't lag either. You can leave stock settings but if course it will get hot quicker. Also with thermal hotplugged or something like that, I used it all cores online all the time at full speed and it doesn't throttle for a long time, so I don't know what overheating are you talking about. My nexus 5 throttle faster and disable 2 of 4 cores and leave the other 2 at half speed, and our processor overheats?. Oneplus throttle the device a lot because of the rumors, fortunately we can change that. Try what I said, cheers.
Sent from my ONE A2005 using Tapatalk
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Click to collapse
Thanks for the tip with thermal extreme! The implementation in the latest Boeffla kernel v1.1 beta1 seem to do a very good job of not letting the phone get too hot while at the same time not throttling the CPU too much. Today, the performance was stable for almost 30 minutes of gaming, and when I checked the CPU stats I saw that all cores were still active (2x A53 + 4x A57), and only throttled to 960 MHz. This still delivered enough performance. (I started the game with both CPU clusters at 1.2 GHz, so this also seemed to help with keeping the phone at an acceptable temperature. I'm sure it would've gotten much hotter much quicker at higher CPU frequencies.)
I have to admit though, I was playing inside in an unlit room and thus the screen wasn't at max. brightness. We'll see how it will perform during my next work break when I have to make the screen much brighter.
vonotny said:
Thanks for the tip with thermal extreme! The implementation in the latest Boeffla kernel v1.1 beta1 seem to do a very good job of not letting the phone get too hot while at the same time not throttling the CPU too much. Today, the performance was stable for almost 30 minutes of gaming, and when I checked the CPU stats I saw that all cores were still active (2x A53 + 4x A57), and only throttled to 960 MHz. This still delivered enough performance. (I started the game with both CPU clusters at 1.2 GHz, so this also seemed to help with keeping the phone at an acceptable temperature. I'm sure it would've gotten much hotter much quicker at higher CPU frequencies.)
I have to admit though, I was playing inside in an unlit room and thus the screen wasn't at max. brightness. We'll see how it will perform during my next work break when I have to make the screen much brighter.
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Does it throttle to 960mhz? for me never reach 1,2ghz. Playing real Racing for 30min it stays at 1,2ghz. And with thermal hotplugged (all cores enabled, all at stock freq gpu too) it doesnt throttle for 30 min, gpu only sometimes to 510mhz, i played 30 minutes and it didnt throttle, i dont know when it was going to throttle because i stop playing. But also, gaming with all cores and no throttling eats the battery.
Migdilu said:
Does it throttle to 960mhz? for me never reach 1,2ghz. Playing real Racing for 30min it stays at 1,2ghz. And with thermal hotplugged (all cores enabled, all at stock freq gpu too) it doesnt throttle for 30 min, gpu only sometimes to 510mhz, i played 30 minutes and it didnt throttle, i dont know when it was going to throttle because i stop playing. But also, gaming with all cores and no throttling eats the battery.
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I guess it throttled to 960 MHz because the game I'm currently playing (République) is pretty resource hungry.
Related
According to the System Tuner app, my CPU went up to 75 degrees Celsius while I was playing a track on Google Earth. I was running Earth for only a few minutes before it reached 75. I'm not sure if that's the peak yet...maybe it can go even higher.
I've seen several other threads about heat, but most people talk about 50s and 60s. Anyone reach 75C? The front and back of the phone, the top around the camera, were both very hot. It was almost uncomfortable to touch.
Again, I'm talking about 75 Celsius, not Fahrenheit. And I'm referring to CPU temperature according to System Tuner app, not battery temp. Anyone reach this?
picture plz.
the reason is bc someone did a stress test on the N4 and found that the device shuts down at ~57-59C (correct me if im wrong) to prevent damage to the hardware.
Edit: found the link http://www.youtube.com/watch?feature=player_embedded&v=koLJ4BU9tgc
75ºC on a quad core?
I thought it was supposed to be more efficient than a dual core... 167ºF just seems like it's way hotter than any electronic device should ever be.
Sent from my SPH-D710 using xda premium
My first gaming laptop was an ASUS Republic of Game first generation. They did a horrible job cooling the machine. During the 2 months before the machine failed, the GPU would reaches 110 - 140 C if I played games (then, of course, the machine turned the GPU off and still ran as everything else was still about 70-80 C)
When the machine did fail, I opened it up, and found 2 fried thermal unit, a fried GPU and a nearly fried HDD) Amazingly, the machine stills runs, as long as I don't load GPU driver
Well, that's the story. Back to OP, as you see, if the temp is too high, you device can be literally fried. So if you turn off the thermal throttle, please enable it back on and do you best to keep your device cool
I tried to replicate just now and could only go up to 63c. I don't want to keep trying based on the comments here so far. If it happens again I'll be sure to get a screen shot and be aware of what's running.
Where would the thermal throttle toggle exist, if I have the capability at all? I'm running faux123 kernel and use trickster mod and trinity kernel tools for tweaking. I don't see anything about throttle control.
On a similar note, faux123 seems to default to 1ghz minimum cpu frequency. Does that seem right? I've flashed lots of kernels before on previous phones and they always default to the lowest value. When I force the setting down to 384mhz, it automatically changes back to 1024mhz the next time I go in my tool apps. Does this seem normal?
denimjunkie82 said:
Where would the thermal throttle toggle exist, if I have the capability at all? I'm running faux123 kernel and use trickster mod and trinity kernel tools for tweaking. I don't see anything about throttle control.
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I haven't seen a Nexus 4 kernel that has thermal throttle toggle, or have it disabled yet. I am just checking if you're running one that I am not aware of
denimjunkie82 said:
On a similar note, faux123 seems to default to 1ghz minimum cpu frequency. Does that seem right? I've flashed lots of kernels before on previous phones and they always default to the lowest value. When I force the setting down to 384mhz, it automatically changes back to 1024mhz the next time I go in my tool apps. Does this seem normal?
Click to expand...
Click to collapse
Minimum cpu frequency enforced by kernel is normal. I am not certain if faux123 default to 1 ghz min, but if it's the case, it seems weird for me too. Definitely not good for the battery. If there's no other CPU control apps, I recommend double check the settings, then find an update for faux123, or use trinity kernel
I just flashed a new kernel and my minimum cpu now seems more normal. I hopefully that alleviates the crazy temperatures too.
I'll try to test again tomorrow to see if my temps still go bonkers. It's time to sleep now. Thanks for the help, everyone.
Hello Guys, i registered to XDA developers to ask this question so please reply. i heard many say GPU of Nexus 4 is very bad because after 20 mins of gameplay the phone gets heated and the GPU performance is Dramatically Reduced to cooldown. I am going to buy Nexus 4 thats y im asking, i didnt hear this from my neighbours..., i saw someone say this in youtube comments. Anyone Experiencing this Issue? or its a defective product?.
This is a good thread to read about Thermal Throttling: http://forum.xda-developers.com/showthread.php?t=2144652
I am not sure about the GPU actually reducing it's power when the nexus is getting hot. I know the CPU will clock lower when it has reached 70 degrees so it can cool down. Most kernel's have the ability to up this to about 100 degrees so you won't have the thermal throttling as fast. You are also able to remove the throttling completely with a commando.
I've played alot of Dungeon Hunter 4/GTA Vice City/Real Racing 3 and I have never experienced severe FPS drops because of it getting hotter. The only thing you will experience is a battery that will be empty within 2 hours.
PS: This is based on what i've read on the forums, I do not have my nexus 4 for that long and I am not a developer, someone might be able to give you more accurate information.
The thermald.conf sets the battery threshold to about 40-41C before it begins to underclock aggressively (hence why it feels sluggish). I forget the exact number. It starts reading "Overheating" status when it reaches about 46C. Max rated temperature for the battery is 60C.
At that battery temperature ~41C, the CPU is no more than about 50C, so it's not the CPU overheating.
If you feel so inclined, you can modify the thermald.conf with root to modify how aggressive the thermal throttling acts, within reason. Otherwise you'll cook your phone.
desynch- said:
The thermald.conf sets the battery threshold to about 40-41C before it begins to underclock aggressively (hence why it feels sluggish). I forget the exact number.
At that temperature, the CPU is no more than about 50C.
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or you can run a custom kernel(like trinity) that disables the battery thermal throttle and not worry about it.
simms22 said:
or you can run a custom kernel(like trinity) that disables the battery thermal throttle and not worry about it.
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Click to collapse
YMMV with that. My nominal binned SoC overheats really easily. With the way I use my phone, it'd be overheating way too often.
I modified my thermald.conf so it's less aggressive. It's not that hard to figure out.
The phone throttles its clock speed like a PC. It's not a big deal.
Is it safe to change my CPU governor to "performance" to force max clock speed?
I don't want to overclock my Note 4, don't worry, not talking about that. But I am talking about MAX clocking it - forcing it to run at maximum rated speed. I've already tested out SetCPU and used it to change my governor to performance which forces the clock to max, and it nearly doubled my framerate in many games, especially the ones that struggled to play on this device like Xcom:EW.
But I quickly turned it off because I wasn't sure it was safe to do in the new era of smartphones, what with their DVFS and all. I'm worried that I'm going to overheat the CPU, and it's not going to be able to downclock because of temperature anymore. I'm only modifying the governor, but what if I actually used SetCPU to just change the CPU clock to max, without even touching the governor?
Can I hurt my phone by doing this? Can I safely start forcing my CPU to run faster while playing games, knowing that the only thing I risk is my battery draining faster, or am I actually risking damaging components by doing this?
Hello and thank you for using Q/A,
your CPU will not be damaged, but the battery life time will be shorted.
Regards
Trafalgar Square
RC
I personally have used Performance governor on Moto X 2013 for almost the whole 8 months I had it, 24x7 I mean. Never had a problem, yeah maybe battery life was little less than normal but I never did really care about it. Then I ran the same governor for a good period of time on my Note 3 too, same, no problem at all. Like you said, in games the frame rate difference is massive, but I don't play much games, I simply used that governor because it gets rid off all those micro lags and jitters which are Android's trademark, I simply can't them, with default Interactive the micro lags are very apparent.
However with Note 4 I am pretty happy with the BluActive governor, it makes most of the micro lags to go away, so sticking with it.
In any case unless you plan to use a mobile phone for maybe 5 years or so, I don't see any problem at all with it, other than a slightly increased heat, and maybe a little less battery backup, but you will find so many comments which might scare you, that chip burns off if you run it and all that, but those mainly are BS.
Devs,
The performance of le 2 is very bad when it comes to gaming.
It is the same in every stock eui to miui and all lineage os ROMs like AICP which uses lineage is kernel.
As per my finding this is due to severe thermal throttling in eui as well as in lineage os 13 and 14.1.
Firstly the two A72 CORES don't run while any task making it like SD 650 and clock go soo down at reaching 34° to 35°c and at above temp all A72 CORES ARE DOWN in lineage is and only one works in stock eui, same goes with GPU under clocking starts at 32°c making gaming experience horrible,
Even kernel auditor don't have any control in any of the ROMs and in lineage is 14.1 27 Feb build it is told it have core control but it can make all A72 cores run couldn't control clock speeds and result is the same ,
So I request devs please make a kernel from scrap and don't take hints from eui kernel and give us good gaming experience.
Thank you
ajroxxx said:
Devs,
The performance of le 2 is very bad when it comes to gaming.
It is the same in every stock eui to miui and all lineage os ROMs like AICP which uses lineage is kernel.
As per my finding this is due to severe thermal throttling in eui as well as in lineage os 13 and 14.1.
Firstly the two A72 CORES don't run while any task making it like SD 650 and clock go soo down at reaching 34° to 35°c and at above temp all A72 CORES ARE DOWN in lineage is and only one works in stock eui, same goes with GPU under clocking starts at 32°c making gaming experience horrible,
Even kernel auditor don't have any control in any of the ROMs and in lineage is 14.1 27 Feb build it is told it have core control but it can make all A72 cores run couldn't control clock speeds and result is the same ,
So I request devs please make a kernel from scrap and don't take hints from eui kernel and give us good gaming experience.
Thank you
Click to expand...
Click to collapse
My findings were exactly same as yours, the cpu and gpu, both are underclocking for even slightest of temperature rise. This is bad, but the good news is, I figured out a way, by which we can disable this poorly configured thermal throtling.
Delete this file here: /system/etc/thermal-engine-s2.conf
I don't know it it is safe or not, but I have been gaming with my device after deleting this file for about 10 days and there is no explosions yet. Hahaha.
Also, if you want, instead of deleting this file, you can modify some parameters so that, it starts throttling after some really high temperatures, instead of current values, but I like deleting that file because some thermal throtlling algorthm is always embedded in soc anyways.
shivamg95 said:
My findings were exactly same as yours, the cpu and gpu, both are underclocking for even slightest of temperature rise. This is bad, but the good news is, I figured out a way, by which we can disable this poorly configured thermal throtling.
Delete this file here: /system/etc/thermal-engine-s2.conf
I don't know it it is safe or not, but I have been gaming with my device after deleting this file for about 10 days and there is no explosions yet. Hahaha.
Also, if you want, instead of deleting this file, you can modify some parameters so that, it starts throttling after some really high temperatures, instead of current values, but I like deleting that file because some thermal throtlling algorthm is always embedded in soc anyways.
Click to expand...
Click to collapse
See your findings are correct but I myself renamed thermal config s2 but it didnot have any effect and at 33 ° I can see GPU under clocked at 432 MHz and CPU under clocks itself , and at 35° the lagging in games can be seen easily
Will try deleting the file also ,hoping it can have any effect
ajroxxx said:
See your findings are correct but I myself renamed thermal config s2 but it didnot have any effect and at 33 ° I can see GPU under clocked at 432 MHz and CPU under clocks itself , and at 35° the lagging in games can be seen easily
Will try deleting the file also ,hoping it can have any effect
Click to expand...
Click to collapse
My cpu temp have gone over 60°c but I haven't seen any throttling in cpu or gpu. But when, that file was present, those temperatures were never reached because of thermal throttling.
shivamg95 said:
My findings were exactly same as yours, the cpu and gpu, both are underclocking for even slightest of temperature rise. This is bad, but the good news is, I figured out a way, by which we can disable this poorly configured thermal throtling.
Delete this file here: /system/etc/thermal-engine-s2.conf
I don't know it it is safe or not, but I have been gaming with my device after deleting this file for about 10 days and there is no explosions yet. Hahaha.
Also, if you want, instead of deleting this file, you can modify some parameters so that, it starts throttling after some really high temperatures, instead of current values, but I like deleting that file because some thermal throtlling algorthm is always embedded in soc anyways.
Click to expand...
Click to collapse
Deleting this file is an absolutely terrible idea. Modify it instead.
Jelixis said:
Deleting this file is an absolutely terrible idea. Modify it instead.
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Click to collapse
At first, I thought the same. But yesterday, i have played asphalt 8 in bright sunlight(to test if there is some thermal throttling left embedded in soc). And I was right, it throttles down the gpu, big cores, small cores, even some cores went offline automatically. After the device was cooled, everything wqs back to normal. So, IMO, there is no harm even if we play in extreme conditions with the file deleted, thermal throttling will kick in when its needed. Although, I advise modifying the file to others. Hahaha
shivamg95 said:
At first, I thought the same. But yesterday, i have played asphalt 8 in bright sunlight(to test if there is some thermal throttling left embedded in soc). And I was right, it throttles down the gpu, big cores, small cores, even some cores went offline automatically. After the device was cooled, everything wqs back to normal. So, IMO, there is no harm even if we play in extreme conditions with the file deleted, thermal throttling will kick in when its needed. Although, I advise modifying the file to others. Hahaha
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Click to collapse
Thermal throttling happens even in the best chips. Most of the time, it's integrated in the lower level portions of the chip.
Just let it be, really. Thermal throttling is the way of the chip of protecting itself from heat damage. PC processors, for example, shut down when removing the fan and reaching critical temperatures.
Jelixis said:
Thermal throttling happens even in the best chips. Most of the time, it's integrated in the lower level portions of the chip.
Just let it be, really. Thermal throttling is the way of the chip of protecting itself from heat damage. PC processors, for example, shut down when removing the fan and reaching critical temperatures.
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Click to collapse
Ya true it is present in every chip but optimizing is Also a thing right.
In le 2 the two A72 cores don't run at all above 30°(except when opening apps while it is cool ,so after 33 or 34° they are not used in anything,and 34 is average temp of the phone while using ,that means it just exactly works like a loweclocked SD 650 which even more throttled with each degree rise in temp and at 36 ° ( which is avg temperature while gaming ) phone turns off one more A72 core meaning three A72 cores are off and one a72 is throttle to around 800 mhz and even all a53 cores run at half clock speeds and till that time GPU also reaches below 350mhz and lower a and it impossible to run even minor games like subway surfers lag free,
And since lineage is kernel has taken hint from eui kernel ,it performs exactly the same as stock kernel which leaves us with no choice left.
@codeworkx please look into this issue and please build a kernel for gaming performance as SD 652 is getting wasted due to thermal throttling, @codeworkx I am sure you know this issue better than me ,please find time to work on it.
@shivamg95 deleting the thermal file couldn't help this
ajroxxx said:
Ya true it is present in every chip but optimizing is Also a thing right.
In le 2 the two A72 cores don't run at all above 30°(except when opening apps while it is cool ,so after 33 or 34° they are not used in anything,and 34 is average temp of the phone while using ,that means it just exactly works like a loweclocked SD 650 which even more throttled with each degree rise in temp and at 36 ° ( which is avg temperature while gaming ) phone turns off one more A72 core meaning three A72 cores are off and one a72 is throttle to around 800 mhz and even all a53 cores run at half clock speeds and till that time GPU also reaches below 350mhz and lower a and it impossible to run even minor games like subway surfers lag free,
And since lineage is kernel has taken hint from eui kernel ,it performs exactly the same as stock kernel which leaves us with no choice left.
@codeworkx please look into this issue and please build a kernel for gaming performance as SD 652 is getting wasted due to thermal throttling, @codeworkx I am sure you know this issue better than me ,please find time to work on it.
@shivamg95 deleting the thermal file couldn't help this
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Click to collapse
Deleting that thermal engine file, did help. Don't know why it doesn't work for you.
shivamg95 said:
Deleting that thermal engine file, did help. Don't know why it doesn't work for you.
Click to expand...
Click to collapse
It is not working and would have been not working for you also just check with kernel auditor,
I have check it thoroughly .
I think you don't know how to check
Tell me the process you check
ajroxxx said:
It is not working and would have been not working for you also just check with kernel auditor,
I have check it thoroughly .
I think you don't know how to check
Tell me the process you check
Click to expand...
Click to collapse
First i make the soc heat by playing games or running benchmarks, then i open kernel auiditor and check if maximum cpu freq gets lowered or automatically or not. But it doesn't happen after deleting that file. Also, the gameplay seems very fluid then before. I also check for gpu max freq.
Hey, I have Cool 1 (same Soc) and yes, very dissapointed because in second 1 starts the throtling...
I have Kernel auditor. Which settings should I force?
hello, very nice threat.
I had some different experiences.
For me throotling starts slightly at 37° and bigger at 39 or 40 ... this results to throotled big cores at 1248mhz and a gpu to 432
to avoid that I made some underclocking settings which gives my setting antutu score of 69000 instead of 82000 and a geekbench score of 1000/3500 which is giving me cool and fast gaming enough
https://forum.xda-developers.com/le-2/how-to/kernel-adiutor-settings-8h-sot-colour-t3721254
Hi there,
Is it possible to overclock the cpu and gpu?
If so how? Or which rom/kernel?
Running G model 4gb ram
Even if you can, it will chew the battery and heat up.
RobboW said:
Even if you can, it will chew the battery and heat up.
Click to expand...
Click to collapse
Not a problem as I would only be using it sometimes not permanently
Kendal21 said:
Not a problem as I would only be using it sometimes not permanently
Click to expand...
Click to collapse
in theory it is, we had a a kernel that OC'd the CPU way back then, but the SoCs on the Axons are probably low-binned - shutdowns and stuff like that are commonplace
But still, do you know what OC does to a phone? New phones are thermally constrained devices, starting from the snapdragon 800 series onwards. remember the sd805/810 disaster? Well...
If you run your phone at 100% load, it will run at max speed (1.56/2.15) for a very short time (say, 30 seconds), until the SoC reaches a specific temperature. After that it'll go down to a more manageable frequency, eventually going even further down or staying at 1.8 ghz, depending on your specific situation (the pink thermal blob might be bad).
That's why VR mode sets your cores at around 1.8 ghz, to keep them from going hot and lowering frequency even more. Sustained performance is better than burst performance on gaming.
Day to day usage is another matter, because more frequency won't mean thermal throttling when opening apps or unlocking the phone, beside the obvious battery usage
TL/DR: Be prepared to make your own kernel if you want to OC. It might not work