Question about my PSU

[alehenestroza]

Hi, I've purchased yesterday a MSI GTX 970 Gaming 4G GPU, and after playing for about half an hour of Fallout 4, my PC rebooted. It then proceeded to reboot after every hour or so of gaming, so I looked on the forums if anybody had the same problem, and it turns out it may be related to the PSU.
My specs are:
AMD FX 8350
Asus M5 A97 R2.0
8GB DDR3 1600mhz
MSI GTX 970 4G Gaming
Thermaltake TR2 RX 750W

So, I know the problem is probably my PSU, but my question is, supposedly, the GPU needs a 500W PSU, and 28amps on the 12v rail, but my PSU has 750W and (according to the specifications) 52amps on the 12v rail, could it be any other thing that is causing the reboots?
If not, what PSU would you recommend? It would need to be a cheap one.
Sorry about my english, by the way, I'm not a native speaker.

 

[celeron1200]

What was your previous GPU ? And are you sure about the new one was installed correctly ?

 

[alehenestroza]

The previous GPU was a Saphire Radeon HD 5770 Vapor-X. I made sure to uninstall the previous drivers.
What do you mean about installed correctly? I installed the drivers from the CD, and then updated them to the last version (i think it was 1/27/2016)

EDIT: Driver version 361.75

 

[celeron1200]

I mean installing GPU to PCI Express slot and extra pin connectors on the device. It doesn't fit properly maybe.

 

[alehenestroza]

Well, it did fit ok on hte PCI Express slot, and I'm using the 8 pin (6+2) PCI-E plus a 6 pin PCI-E connectors that came with the PSU.

 

[celeron1200]

I suggest you to calculate your estimated power usage from here: http://outervision.com/power-supply-calculator

And anyway, your overall consumption no way near 750 watt, I think, but you should try it even so. If everything seems allright, you better check temperature values of CPU and GPU while gaming. Use MSI Afterburner if you don't. Some of system components might get hot under full load and this might cause restarts.

 

[alehenestroza]

According to that page, I should need around 500W, and I think I have that covered.
And my CPU is new too, I bought it two months ago. The temperature values of both the CPU and GPU are around 45° C (50°C being the max temperature value registered for my CPU).

 

[celeron1200]

Do you use stock cooler ? By the way you didn't state if you overclock your CPU/GPU/RAM and info about your OS ? The issue you face could somehow be related to your GPU driver or Windows 10 compatibility, if possible you should try another version after a little research, because latest one isn't best always.

 

[alehenestroza]

I am using the stock cooler, but the temp values never exceed 50°C, for both the CPU and the GPU. I've never overclocked anything. I'm using Win10 x64. I'll check downgrading to a previous version of the drivers, and see if that works, thanks!