Pc turns off on heavy load

[LHRaBBiT]

Bought new gpu - Sapphire rx 580 nitro+ 8gb and installed it (did ddu and installed newest drivers). Works fine while browsing or playing light games like rocket league, but when I run heaven benchmark pc crashes every time at random times. Tried heavier game - Dead by Daylight and pc crashes after 5-8sec. Crash - pc turns off completely, no blue screens or sounds made and reboots itself. It's new gpu's fault or my psu isn't good for it? Btw gpu wasn't new, bought from a person. 

cpu: Amd Fx-8370
gpu: Msi r9 380 (this was old one, worked fine) 

Ram: kingston 8gb 1333mhz ddr3
Motherboard: amd 970 gaming
psu: Mars 700w

P. S. Temperatures on gpu don't go above 55 Celsius. 

[Origami Cactus]

More info needed on that PSU.

Can you write out all the info on that PSU? What model is it?

Maybe you can take a picture of it?

 

Right now it seems with 90% certainty that it is a PSU issue, especially because it seems to be a really cheap "700"(not really) watt psu.

 

Please replace it with something within Tier A, B or C on that list:

https://linustechtips.com/main/topic/1045610-new-psu-tier-list/

 

[Origami Cactus]

14 minutes ago, LHRaBBiT said:

 

Ok i would replace that bomb with something within Tier A, B or C on that list:

https://linustechtips.com/main/topic/1045610-new-psu-tier-list/

[LHRaBBiT]

55 minutes ago, Origami Cactus said:

Ok i would replace that bomb with something within Tier A, B or C on that list:

https://linustechtips.com/main/topic/1045610-new-psu-tier-list/

Is it really that bad lol? Is buying used psu a bad idea and how many Watts would be recommended for my pc? 

[Origami Cactus]

2 minutes ago, LHRaBBiT said:

Is it really that bad lol? Is buying used psu a bad idea and how many Watts would be recommended for my pc? 

IDK, i haven't heard anything about Tancens PSUS, other than that they fake the 80plus ratings. Also the price is really low for a 700w, so that is also suspicious.

 

I would get a CX550m (gray label) for your PSU, it is a much better psu than your current either way.

I wouldn't buy a used PSU, but idk.

 

I will tag a psu expert @LukeSavenije, maybe he can add some insight.

[LukeSavenije]

1 hour ago, Origami Cactus said:

 

i don't even have to do research on this one, it seems to be peak rated and can't deliver full wattage on the 12v+ rail, which is a bad sign already

 

I'd replace it

[LHRaBBiT]

Ok. Ty guys for the help. I will research what I can get from the list, what my bugget allows me. First off all will check the CX550m.

[LukeSavenije]

9 minutes ago, LHRaBBiT said:

Ok. Ty guys for the help. I will research what I can get from the list, what my bugget allows me. First off all will check the CX550m.

know that there's a difference between the cx 2017 and cxm 2015

 

both should be fine though