Computer Freezing, Overheating?

[kickface2]

I just put together a PC with used parts just to see how it would go and I'm now have a problem I cant seem to figure out. The computer will freeze randomly, It freezes even while idle. All the fans in the computer will stay on (case,gpu,cpu.) The only way I found the computer won't freeze is if I point my large room fan at the computer.

The thing I don't understand is if this is a cooling issue or not because even without the large room fan on my computer I don't have abnormal temperatures, or at least non that I can find.

Taken from bios using HWMonitor. Kept monitoring for about minutes before computer froze. These are what it froze at.

MB Temp - 35c
CPU Temp - 38c
vcore - 1.296
3.3v - 3.265v
5v - 4.950v
12v -12.105v

https://pcpartpicker.com/list/VPRk8K

Any help would be greatly appreciated.

 

[kickface2]

This is a HWMonitor sheet from about 3-5m right before a crash occurred during a prime95 stress test.
http://pastebin.com/WAgdUq1z

Anyone think they might know what could be the problem? When I have the large room fan on the computer I can do a benchmark for GPU and prime95 stress test no problem but when I take the fan away it will freeze, even though the temps seem normal.

Memtest and hard drive check have not found any issues. Please someone give me some knowledge.