Computer Freezes during games

[TotalRecall]

My computer keeps freeze randomly when ever i game. And or run benchmarks.
My main monitor will lose signal and my second monitor will stay on but everything on desktop is froozen. Cant alt delete or anything. I have to force restart. - computer totally locks up. Even after a couple minutes its the same. I must manually turn off psu and restart.

Things ive checked is can chkdsk. It completed.
Temps on cpu / gpus are perfectly fine.
Ran memory test nothing there.

In windows event logger under applications i get:

taskhostex (4048) An attempt to open the file "C:\Users\Noah\AppData\Local\Microsoft\Windows\WebCache\WebCacheV01.dat" for read only access failed with system error 32 (0x00000020): "The process cannot access the file because it is being used by another process. ". The open file operation will fail with error -1032 (0xfffffbf8).

Although im not sure it is related seems to show up in logs after ive restarted.

Other things ive tried are downgrading nvidia drivers.

Im not sure what the heck is the problem Please help me.


Other things to note: This problem never occured before. Ive had this rig for a while now.

Ive only recently cleaned the rig out (dust). And used ssd on a old build to see if it works.
CPU: 2500k 4.4 OC
GPU sli 770 x2
PSU: 750W thermaltake
Motherboard: Asrock z77 extreme 6
Ram: 8gb Ripjaws

 

[Onus]

Please provide your full system specifications, including the brand and model (not just wattage!) of your PSU.

 

[TotalRecall]

Please provide your full system specifications, including the brand and model (not just wattage!) of your PSU.

I updated thread

 

[Onus]

Your Thermaltake PSU probably can't hack that load. What model is it? Does it have a little voltage switch on it?
Another possibility is that your OC is not stable. Set your CPU back to stock and see if it will work.

 

[TotalRecall]

Your Thermaltake PSU probably can't hack that load. What model is it? Does it have a little voltage switch on it?
Another possibility is that your OC is not stable. Set your CPU back to stock and see if it will work.

Yea that would be fine however does not explain being able to run this computer for atleast 6 months gaming and benchmarking. This isnt like i just got this psu.

Ill try the stock oc however.

 

[Onus]

Capacitor aging could have reduced the capacity of your PSU, especially if it has been getting hot during operation.

 

[jb6684]

750watts is a bit small for a SLI pair of 770s. That said, goto stock CPU settings to save power, and, you Only gain a few FPS max with an OC on that CPU. As to why it used to work, perhaps a new game (or new level on game) can easily be more demanding....

Your alternative, is to remove one of the 770's from the system to see if you can run your CPU OC without crashing (yeah, you'll loose a ton of FPS this way...) If your stable with one card, and crashing with two time for a Corsair HX850 (I run CF R9 280X's and draw 650watts from the wall....)

 

[TotalRecall]

Well after going nuts and coming back. Sometime in between i uninstalled the drivers again and now i dont seem to be freezing.