New build PC shuts down every now and then

rafalava

Reputable
Mar 12, 2014
8
0
4,510
Newbie here. I’ve been having problems with my new build, I was hoping someone could help me out here.
Already installed Windows 7 x64 ultimate but PC just shuts down every now and then without warning. Never touched my BIOS, just default settings.
Please help, I don’t know what’ wrong…

Full system specs:
CPU - AMD FX-8350(using default fan)
MoBo – Asus sabertooth 990FX
RAM - Adata 1866MHz 4GBX2
120gb Samsung 840 evo SSD
Everything new except my old but still working:
GPU - SAPPHIRE HD6670 1G GDDR5
PSU - 750W Scythe Chouriki 2
(please let me know if incompatible and/or upgrading is needed)

Thanks.