PC slowed down massively after overclocking GPU

[79robb]

I built my PC (specs below) about 3 months ago and it has been running like a dream. However, last week I bought a 4K monitor and plugged it in. It wasn't able to run some games in 4K such as world of warcraft at an acceptable frame rate at ultra settings. So I tried to overclock the GPU and incrementally increased the core/memory clock until they were at +200. At this point the frames were actually less than before so I reverted it back to the original clock speed but the frames stayed lower and loading times were vastly longer. I quit the game and noticed the general speed was a lot slower such as opening programs and start up time has definitely increased. I'm not sure what component is causing this issue as I've tried to move a game on to a ram disk and although loading times were much faster, the frames were still not as high as before. Have I damaged the GPU or some other component?

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System Information
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Time of this report: 7/27/2016, 19:56:49
Machine name: DESKTOP-3DABP5I
Operating System: Windows 10 Pro 64-bit (10.0, Build 10586) (10586.th2_release_sec.160630-1736)
Language: English (Regional Setting: English)
System Manufacturer: MSI
System Model: MS-7978
BIOS: B.60
Processor: Intel(R) Core(TM) i7-6700K CPU @ 4.00GHz (8 CPUs), ~4.0GHz
Memory: 16384MB RAM
Available OS Memory: 16330MB RAM
Page File: 4105MB used, 15327MB available
Windows Dir: C:\Windows
DirectX Version: 12
DX Setup Parameters: Not found
User DPI Setting: Using System DPI
System DPI Setting: 96 DPI (100 percent)
DWM DPI Scaling: Disabled
Miracast: Available, with HDCP
Microsoft Graphics Hybrid: Not Supported
DxDiag Version: 10.00.10586.0000 64bit Unicode

------------
DxDiag Notes
------------
Display Tab 1: No problems found.
Sound Tab 1: No problems found.
Sound Tab 2: No problems found.
Sound Tab 3: No problems found.
Sound Tab 4: No problems found.
Input Tab: No problems found.

--------------------
DirectX Debug Levels
--------------------
Direct3D: 0/4 (retail)
DirectDraw: 0/4 (retail)
DirectInput: 0/5 (retail)
DirectMusic: 0/5 (retail)
DirectPlay: 0/9 (retail)
DirectSound: 0/5 (retail)
DirectShow: 0/6 (retail)

---------------
Display Devices
---------------
Card name: NVIDIA GeForce GTX 960
Manufacturer: NVIDIA
Chip type: GeForce GTX 960
DAC type: Integrated RAMDAC
Device Type: Full Device
Device Key: Enum\PCI\VEN_10DE&DEV_1401&SUBSYS_32021462&REV_A1
Display Memory: 10181 MB
Dedicated Memory: 2016 MB
Shared Memory: 8165 MB
Current Mode: 1920 x 1080 (32 bit) (60Hz)
Monitor Name: AOC 2879
Monitor Model: U2879G6
Monitor Id: AOC2879
Native Mode: 3840 x 2160(p) (59.997Hz)
Output Type: Displayport External
Driver Name: nvd3dumx.dll,nvwgf2umx.dll,nvwgf2umx.dll,nvwgf2umx.dll,nvd3dum,nvwgf2um,nvwgf2um,nvwgf2um
Driver File Version: 10.18.0013.6881 (English)
Driver Version: 10.18.13.6881
DDI Version: 12
Feature Levels: 12.1,12.0,11.1,11.0,10.1,10.0,9.3,9.2,9.1
Driver Model: WDDM 2.0
Graphics Preemption: DMA
Compute Preemption: DMA
Miracast: Not Supported
Hybrid Graphics GPU: Not Supported
Power P-states: Not Supported
Driver Attributes: Final Retail
Driver Date/Size: 10/07/2016 00:00:00, 17463992 bytes
WHQL Logo'd: Yes
WHQL Date Stamp:
Device Identifier: {D7B71E3E-5741-11CF-336D-0F121CC2C735}
Vendor ID: 0x10DE
Device ID: 0x1401
SubSys ID: 0x32021462
Revision ID: 0x00A1
Driver Strong Name: oem70.inf:0f066de3d2368449:Section045:10.18.13.6881ci\ven_10de&dev_1401
Rank Of Driver: 00D12001

 

[Supahos]

Wait you tried to run wow @ 4k ultra settings with a gtx 960? Okay now that I'm through shaking my head, I'd go into bios and restore to defaults and do the same with afterburner or whatever you used to oc the gpu.

 

[Paco__]

As a reference, I play WoW on a GTX970 at 1440p and (as of the latest Legion patch) if I set all the graphics settings to the highest possible it gets below 60fps sometimes. I lowered the shadow and water effects a notch, set AA to MSAAx4 and now it's solid 60fps (yes, I have sync enabled).

 

[79robb]

Wait you tried to run wow @ 4k ultra settings with a gtx 960? Okay now that I'm through shaking my head, I'd go into bios and restore to defaults and do the same with afterburner or whatever you used to oc the gpu.

I can run wow at 4K at over 100 frames in certain places with my 960 thank you very much, it's just the loading times are much longer than before I OC'd and some parts of the game (textures, NPCs etc) take a long time to load in. I have already restored the clock to default speeds in afterburner and that made no difference

 

[Supahos]

Id go default in bios as well, and check power % in afterburner/bios/windows maybe defaulted something when it stopped working right. Yes I'm sure it works in spots but no way you can run a raid like that with over 25 fps

 

[79robb]

Id go default in bios as well, and check power % in afterburner/bios/windows maybe defaulted something when it stopped working right. Yes I'm sure it works in spots but no way you can run a raid like that with over 25 fps

haha, ok maybe some raids go a bit below 30 frames

 

[79robb]

I guess another symptom would be that the PC is constantly accessing the disk and in task manager the disk is at 100% all the time even though sometimes there are about 5 processes using 0.1/0.2MB/S.

 

[Supahos]

Well that is certainly your issue. Now the question is why. That's getting beyond normal questions for me only thing I can think is run a check on the disk itself or try installing windows on another hd if you have one laying around

 

[79robb]

Well that is certainly your issue. Now the question is why. That's getting beyond normal questions for me only thing I can think is run a check on the disk itself or try installing windows on another hd if you have one laying around

Ok think I might have found something. My RAM is doing over 100 hard faults and after a bit of research I found that a lot of these errors cause high disk usage and slowing down the system. I can't check if this is the problem right now but if anyone knows if this could be my problem or a fix to it that would be great.