Computer shuts down/crashes randomly (no bsod)

Kermit1911

Honorable
Jul 29, 2013
1
0
10,510
I recently build a budget gaming rig for my brother, this was my fourth build and the first one to ever give me serious problems.

It will run fine if you're just using it to browse the web but if left alone for 20-45min. it will lock up at the mobo logo screen (pre bios) and while gaming it will sometime last 15 min. and sometimes 2 hours, then it will crash and do the same thing, no bsod.
I've tried upgrading the OS from 32bit to 64 thinking it may be some compatibility issue.

ECS A960M-M3 AM3+ AMD 760G Micro ATX AMD Motherboard

MSI N650-MD1GD5/OC GeForce GTX 650 1GB 128-bit GDDR5 PCI Express 3.0 x16 HDCP Ready Video Card

RAIDMAX HYBRID 2 RX-530SS 530W ATX12V V2.2/ EPS12V SLI Ready CrossFire Ready Modular Power Supply

AMD Athlon II X2 270 Regor 3.4GHz Socket AM3 65W Dual-Core Desktop Processor

G.SKILL Ripjaws X Series 4GB (2 x 2GB) 240-Pin DDR3 SDRAM DDR3 1333 (PC3 10666)

Western Digital WD Blue WD5000AAKX 500GB 7200 RPM 16MB Cache SATA 6.0Gb/s 3.5"

The Cpu has it's stock heatsink with arctic silver and seems to idle at 30-35c and I have never seen it above 56c, the case is well cooled with 3x120mm fans.