zlambaks
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Overclocked my GPU with Evga Precission X - GeForce 635M - with a stock core clock 660Mhz to 750 Mhz, and memory clock from 900 Mhz to 1005 Mhz. Started the clock slowly (increasing 10 mhz each time)while checking the stress test results - temperatures/fps drops ect. Everything looked fine. Until I clocked above 800 Mhz core clock. Started having artifacts and other bugs, eventually screen went black. Opened the laptops insides, disassambled the heat sinks to let everything cool faster. Removed the old factory thermal paste and overlaid a new one. After that everything worked when booted back up. Tried to clock a little lower this time - core clock 715 Mhz. Everything ran smooth. Played Arma 3 for few hours, which is a quite demanding CPU/GPU game. No issues, fps was great. After that I decided to run a Unigine Valley stress test, how reliable this clock is. After an hour my core clock went down to 270 Mhz/memory clock at 405 mhz and this hasn't changed since then. The core clock sometimes drops to 135 Mhz for few seconds, but then back on 270 Mhz. I've tried most of the methods found on internet: reinstalled drivers, installed an older driver, rebooted, went inside the nvidi control panel to change the performance settings.. Nothing works. Even tried the CPU-Z 0.4-9 version as someone on the internet stated it would help - "it forces the 3d mode so that the clock speed goes higher"... It didn't. Here's a picture from the CPU-Z at full load. Shows the same clock speed in FurMark stress test, EVGA OC and Precission X while under load.
post edited by zlambaks - 2016/04/29 10:28:40
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the_Scarlet_one
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Re: GeForce 635M Stuck on 270 core clock speed and 405 memory clock after an overclock
2016/04/29 10:28:31
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First and foremost, overclocking mobile Gpu's is not supported. Even though it is possible, you will find that it is mostly not suggested by Nvidia, and evga precision does not officially support any mobile Gpu's.
One thing I would suggest trying, remove the drivers while in safe mode. Restart and then reinstall once again. If that doesn't work, try going back to an old restore point and seeing if that will work and allow everything to return to normal.
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ty_ger07
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Re: GeForce 635M Stuck on 270 core clock speed and 405 memory clock after an overclock
2016/04/29 11:26:13
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In addition to reinstalling the drivers, you unistalled Precision X (and left it uninstalled), right?
You should uninstall Precision X, reboot your computer, and then reinstall your graphics drivers using the clean install option or by using Display Driver Uninstaller.
The issue you describe indicates that Precision is causing your display drivers to crash and recover into a limp/safety mode where clocks are locked in a low performance state to prevent further crashes. The best way to fix your issue is to get rid of whatever issue Precision X is triggering.
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ty_ger07
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Re: GeForce 635M Stuck on 270 core clock speed and 405 memory clock after an overclock
2016/04/29 11:32:59
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I am also concerned why there are so many "unknown" values displayed in the GPU-z screenshot you posted. It should look more like this:  Please download an updated version of GPU-Z and confirm that the information then starts displaying correctly. If information is still "unknown" after using an updated GPU-Z version, that could indicate a hardware, BIOS, or driver issue. I think the bigger problem and solution is uninstalling Precision X as stated in my previous post. This is just a side concern of mine.
post edited by ty_ger07 - 2016/04/29 11:37:31
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zlambaks
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Re: GeForce 635M Stuck on 270 core clock speed and 405 memory clock after an overclock
2016/04/29 12:00:00
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ty_ger07
In addition to reinstalling the drivers, you unistalled Precision X (and left it uninstalled), right?
You should uninstall Precision X, reboot your computer, and then reinstall your graphics drivers using the clean install option or by using Display Driver Uninstaller.
The issue you describe indicates that Precision is causing your display drivers to crash and recover into a limp/safety mode where clocks are locked in a low performance state to prevent further crashes. The best way to fix your issue is to get rid of whatever issue Precision X is triggering.
Yes, the Precision X is uninstalled through control panel + deteled the "profiles" folder in the Program Files directory, don't know where I should check if there i any other place where it stores information. I did uninstall the drivers using DDU through safe mod, as you just said and did a clean driver install, if I understood that one correctly(Manually through the webside, not the GeForce experience?). Nothing works. Same Mhz - 135 Mhz and 270 Mhz on load. 
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ty_ger07
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Re: GeForce 635M Stuck on 270 core clock speed and 405 memory clock after an overclock
2016/04/29 12:30:04
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I am not having luck finding it at the moment, but I remember that there is a thread here someowhere on the forum where someone had a similar issue. I believe that their solution was to search through the registry and delete all records of Precision in the registry and then reinstalling the graphics drivers.
Perhaps you can consider the system restore option recommended above in order to achieve the desired result in an easy manner.
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Sajin
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Re: GeForce 635M Stuck on 270 core clock speed and 405 memory clock after an overclock
2016/04/29 12:33:22
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Post a picture of msi afterburner/px hardware monitor graph.
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Madmaxneo
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Re: GeForce 635M Stuck on 270 core clock speed and 405 memory clock after an overclock
2016/04/29 12:57:26
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+1 @Sajin
Here are a few other things you can try:
1. Download the trial version of Ccleaner and install.
2. Uninstall everything with the graphics (PrecisionX, graphics drivers, Geforce experience, etc). Also uninstall Riva tuner stuff if installed.
3. Restart your PC if required.
4. Run Ccleaner registry cleaner.
5. Reinstall your graphics driver and geforce experience if you had it before.
6. Download and install MSI Afterburner.
7. Run your tests
8. Post results here
The reason I say to run MSI Afterburner is because Precision X has been known to have stability issues for a long time, whereas Afterburner is an extremely reliable program that I have even seen EVGA techs recommend. I have a GTX 980 in my PC and that is what I use now, after having similar issues that you report.
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zlambaks
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Re: GeForce 635M Stuck on 270 core clock speed and 405 memory clock after an overclock
2016/04/29 14:38:10
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Here are the results at 99% load.  I did everything you said and no difference. I even tried to recover windows to a certain point few days back, but still the same. My last option, that I could think if is to re-install windows, but since the recovery didn't work, I doubt reinstalling windows will. The GPU shouldn't be damaged(or is?), since I still can play games without any artifacts or bugs, just the FPS is reallly low because of the low clock speed.
post edited by zlambaks - 2016/04/29 14:44:35
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Sajin
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Re: GeForce 635M Stuck on 270 core clock speed and 405 memory clock after an overclock
2016/04/29 14:43:01
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What is GPU Power % reading at 99% load?
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zlambaks
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Re: GeForce 635M Stuck on 270 core clock speed and 405 memory clock after an overclock
2016/04/29 14:54:07
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Sajin
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Re: GeForce 635M Stuck on 270 core clock speed and 405 memory clock after an overclock
2016/04/29 14:58:41
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Looks like it doesn't provide that info. Are you running off battery or are you plugged directly into the wall? Doing a reinstall of windows is a good idea.
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ty_ger07
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Re: GeForce 635M Stuck on 270 core clock speed and 405 memory clock after an overclock
2016/04/29 15:01:06
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The problem is either hardware or software. It is looking more and more like the problem is hardware. Like Sajin said, if the GPU reports a power %, it may be interesting to see the power % reported at idle and load. If power % is always high, it indicates a likely failure of the card's low resistance current sense resistor(s). Another thing which sometimes trips this issue is if the laptop's battery, charger, or voltage regulator circuitry on the laptop motherboard fails, it can cause the laptop hardware to force the video card to downclock because it believes that the video card is exceeding the motherboard's video card power limit. There is circuitry in the laptop which forces a hardware downclock to prevent the motherboard power traces from melting if it thinks that the video card is exceeding it's power draw limit. Edit: I took too long to reply. I see that there is more information now. I would also recommend reinstalling the operating system as a last resort. I don't see any other likely solution. If reinstalling the operating system doesn't help, I think you are probably looking at a failure on your video card, motherboard, or charging system failure.
post edited by ty_ger07 - 2016/04/29 15:04:03
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the_Scarlet_one
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Re: GeForce 635M Stuck on 270 core clock speed and 405 memory clock after an overclock
2016/04/29 15:02:55
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I doubt reinstalling windows would help either honestly. Are you outside of warranty?
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zlambaks
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Re: GeForce 635M Stuck on 270 core clock speed and 405 memory clock after an overclock
2016/04/29 15:08:16
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Maybe anything usefull here. With 99% load  and with 0% load 
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ty_ger07
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Re: GeForce 635M Stuck on 270 core clock speed and 405 memory clock after an overclock
2016/04/29 15:13:56
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It's interesting that GPU-Z claims that the reason for throttling at 99% load is due to "utilization". 99% is very high utilization. Why are NVIDIA drivers claiming low utilization?
When I push my laptop's video card to beyond the motherboard's max current rating, the clock drops, but the perfcap reason is blank. It isn't "util" when I do it on purpose.
Hmm...
Maybe that is some redeeming hope to indicate that a driver bug has caused it to stop sensing utilization properly. I know that Kboost purposely alters/circumvents proper power reports to the NVIDIA drivers. Maybe it has corrupted something.
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Sajin
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Re: GeForce 635M Stuck on 270 core clock speed and 405 memory clock after an overclock
2016/04/29 15:15:55
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Scarlet-Tech
I doubt reinstalling windows would help either honestly. Are you outside of warranty?
Wouldn't hurt to try it anyways. A reinstall will tell us if it's hardware/software related.
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zlambaks
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Re: GeForce 635M Stuck on 270 core clock speed and 405 memory clock after an overclock
2016/04/29 15:22:06
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and maybe this will tell something aswell, or not ..  With 0 % load  with 99% load  Either way, I think i'll proceed with re-installing windows, since as it seems, it's the only option left. And about warranty.. it's long gone. I was just trying to beef my laptop a little bit, squeeze some more out of it to gain few more fps, so that I don't have to buy a new PC. It seems I'll have to get a new one either way 
post edited by zlambaks - 2016/04/29 15:25:41
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Sajin
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Re: GeForce 635M Stuck on 270 core clock speed and 405 memory clock after an overclock
2016/04/29 15:22:08
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Try unplugging from the wall if you're running off wall power to see if it makes a difference in clocks while running off battery.
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zlambaks
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Re: GeForce 635M Stuck on 270 core clock speed and 405 memory clock after an overclock
2016/04/29 15:29:38
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Did unplug it. Nothing changed, still the same figures.
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Sajin
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Re: GeForce 635M Stuck on 270 core clock speed and 405 memory clock after an overclock
2016/04/29 15:30:47
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Let us know how the reinstall goes.
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mike406
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Re: GeForce 635M Stuck on 270 core clock speed and 405 memory clock after an overclock
2016/04/29 16:31:24
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I'm a bit confused why your Afterburner is showing 2 GPUs if it's just a 635M. Also it's clearly misreading something considering the max values are 4294967296 (highest possible number the program can display).
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the_Scarlet_one
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Re: GeForce 635M Stuck on 270 core clock speed and 405 memory clock after an overclock
2016/04/29 16:50:23
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mike406
I'm a bit confused why your Afterburner is showing 2 GPUs if it's just a 635M. Also it's clearly misreading something considering the max values are 4294967296 (highest possible number the program can display).
Probably the cpu graphics. That normally reads as a second gpu.
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zlambaks
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Re: GeForce 635M Stuck on 270 core clock speed and 405 memory clock after an overclock
2016/04/29 17:08:12
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Scarlet-Tech
mike406
I'm a bit confused why your Afterburner is showing 2 GPUs if it's just a 635M. Also it's clearly misreading something considering the max values are 4294967296 (highest possible number the program can display).
Probably the cpu graphics. That normally reads as a second gpu.
Yes, the 2nd one is the Intel integrated CPU gpu.
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Madmaxneo
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Re: GeForce 635M Stuck on 270 core clock speed and 405 memory clock after an overclock
2016/04/29 21:14:43
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First, what version of windows are you on? Second, did you by chance use nvidia inspector? If you did and changed some numbers in there I would recommend resetting everything to their default values. Finally, do these reported clock speeds affect game or actual system performance or is the only indication you are seeing are the reported numbers? One last thing you can try is if you are running the latest nvidia driver is to uninstall your graphics driver and reinstall a 362 driver version. I have heard that some people report issues with anything newer than that and the 362 drivers are the most stable. I have not had any problems like that and I am on windows 10 64 bit and running the latest drivers, but I am also on my PC. EDIT: Since you said you removed the video card and applied new TIM then I would double check to ensure that everything is connected properly and no wires are kinked or anything is exposed and possibly touching other components. One last question: You mentioned you took it apart to let it cool faster; how hot did it get?
post edited by Madmaxneo - 2016/04/29 21:19:26
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zlambaks
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Re: GeForce 635M Stuck on 270 core clock speed and 405 memory clock after an overclock
2016/04/30 02:22:30
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I don't know how, or what it fixed, but re-installing windows helped. For now at least.. Will keep a stress test on for few hours to see how stable the clock speed is. 
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Sajin
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Re: GeForce 635M Stuck on 270 core clock speed and 405 memory clock after an overclock
2016/04/30 04:38:01
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zlambaks
I don't know how, or what it fixed, but re-installing windows helped. For now at least.. Will keep a stress test on for few hours to see how stable the clock speed is.
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Sajin
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Re: GeForce 635M Stuck on 270 core clock speed and 405 memory clock after an overclock
2016/04/30 05:06:30
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Moral of this thread: Don't use precision x.
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ty_ger07
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Re: GeForce 635M Stuck on 270 core clock speed and 405 memory clock after an overclock
2016/04/30 05:52:55
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Great news! I have to assume that the reason for the issue was that something in the driver was corrupted and wasn't fixed even after driver cleaning or system restore and that whatever was corrupted either was caused by Precision X's Kboost function causing a load or power sensing problem or was caused by something causing the graphics driver to crash and recover into low performance limp/safe mode. I am glad that it was just a software problem. I was pretty convinced that it was a hardware problem until I noticed that the perfcap reason was "util" at 99% load (a seemingly software problem indication). My final concern is how fast the temperature rose up to 86c in your last screenshot and how the graph looks like the temperature would have continued to rise mush higher. Would you consider that normal? Does your laptop seem to have an inadequate cooler and tend to run hot? Or is it just Furmark which gets that hot, that rapidly? Do games tend to stay at a cooler temperature, or do.they seem to run at 85-90+c? Have you considered that you should attempt to get that skyrocketing temperature a little bit more under control? Are you sure that the heatsink isn't plugged with dust? Are you sure that the thermal paste on the core is present and there isn't too much thermal paste or too little thermal paste and that the thermal paste isn't all dried out and hard? Your first post seemed to indicate that you changed the thermal pads. You said "overlaid" which seems to describe laying out a pad better than it describes squeezing paste out of a tube. Can you describe your thermal paste or thermal pad application method better? Is the heatplate over the core firmly and evenly attached to the core chip?
post edited by ty_ger07 - 2016/04/30 06:08:13
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Madmaxneo
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Re: GeForce 635M Stuck on 270 core clock speed and 405 memory clock after an overclock
2016/04/30 07:54:33
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ty_ger07
Great news! I have to assume that the reason for the issue was that something in the driver was corrupted and wasn't fixed even after driver cleaning or system restore and that whatever was corrupted either was caused by Precision X's Kboost function causing a load or power sensing problem or was caused by something causing the graphics driver to crash and recover into low performance limp/safe mode. I am glad that it was just a software problem. I was pretty convinced that it was a hardware problem until I noticed that the perfcap reason was "util" at 99% load (a seemingly software problem indication).
My final concern is how fast the temperature rose up to 86c in your last screenshot and how the graph looks like the temperature would have continued to rise mush higher. Would you consider that normal? Does your laptop seem to have an inadequate cooler and tend to run hot? Or is it just Furmark which gets that hot, that rapidly? Do games tend to stay at a cooler temperature, or do.they seem to run at 85-90+c? Have you considered that you should attempt to get that skyrocketing temperature a little bit more under control? Are you sure that the heatsink isn't plugged with dust? Are you sure that the thermal paste on the core is present and there isn't too much thermal paste or too little thermal paste and that the thermal paste isn't all dried out and hard? Your first post seemed to indicate that you changed the thermal pads. You said "overlaid" which seems to describe laying out a pad better than it describes squeezing paste out of a tube. Can you describe your thermal paste or thermal pad application method better? Is the heatplate over the core firmly and evenly attached to the core chip?
When I first started OCing my GPU I was told never to use kboost because it is even less stable that precision x without it. Stick with Afterburner. There are even loads more skins available for Afterburner. I have the precision X skin for Afterburner....lol.
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