GTX 780TI Power use 99% Gpu 50%, Drivers crashing!?

[Moderation_1]

Hello, I've been using a GTX 680, until it started having issues with drivers crashing constantly, trying EVERY fix i've found and to no avail the only way i seemed to "help" it was putting my aircon on and keeping it below 55C... when aircon was off it was only raising to 65c so i dont understand why it would kill it's self at 65c and not at 55c.

It then died a few days later and i threw the GTX 680 in the trash and i ordered a 780TI.
Plugged it in, updated drivers.

With a 650 W PSU I opened a game and GPU -Z
And it started crashing about 5 min in to playing, With no aircon, the GPU ran at 47 C and with aircon, crashing still happened, at around 40C

I restarted, tried a different game. Still crashed, but the whole computer went black both times and the GPU's fans sped to 100%. Had to shut off PC to get it to respond.

The small amount of time before the 780TI crashed, Power draw was at 98% and GPU usage was at 60%.

I have 8gb ram, Corsair H100, i7 2600k and a few other fans and LED's.
GA-Z77-D3Hx

I'm going out and buying a 1250W power supply tomorrow.. maybe that will help. Any help im pulling my hair out!

 

[BadActor]

Likely the PSU just failed as I'm guessing it had a few years on it. You only need a good quality 600 watt or larger PSU for the GTX 780 Ti.

http://www.realhardtechx.com/index_archivos/Page362.htm

https://pcpartpicker.com/product/nB3RsY/seasonic-power-supply-s12ii620bronze

 

[Moderation_1]

When you say that the PSU may have failed, would the other computers systems not shut off upon the moment of crashing, say the fans, led's and motherboard etc.

I just don't find it very easy to believe that because the PSU "fails" why the only thing affected is the GPU and when it "fails" it's when the GPU is put under stress. Thank you for the reply! Any explanation would be valued so i can understand. Thanks

 

[BadActor]

The PSU can go out of specs on voltages and cause all sorts of strange problems. Since you've already tried another graphics card, that leaves the most common cause as the PSU, followed by the motherboard. You can try the graphics card in another system just in case the new one happens to be bad, and borrow another PSU to see if that really is the culprit as a means of double checking. Did you update all your drivers? Have you run memtest? Have you done a thorough scan for malware and virus'?

 

[Moderation_1]

The PSU can go out of specs on voltages and cause all sorts of strange problems. Since you've already tried another graphics card, that leaves the most common cause as the PSU, followed by the motherboard. You can try the graphics card in another system just in case the new one happens to be bad, and borrow another PSU to see if that really is the culprit as a means of double checking. Did you update all your drivers? Have you run memtest? Have you done a thorough scan for malware and virus'?

I've done all but memtest. I'll attempt memtest tomorrow, then another PSU and update then. Thanks!