Random Shutoff, but not the "normal" random shutoff.

[Bbpsword]

Hey forums,

I recently built a gaming rig, and I love it. However, the past couple days my computer has been shutting off randomly, and then booting into the post, but no further. It just get's stuck on the screen that says GIGABYTE 890X A-UD3 (motherboard model) and then it sits there. All fans spin at what I believe to be normal speed, and I'm not sure what is going on. It's quite annoying.

Here's my rig:
AMD Phenom II X4 955 w/ stock cooler (plan on a h50)
4Gb DDR3 1333 MHz Patriot G Series
WD Caviar Green 500Gb
ASUS Radeon EAH5850 DirectCU
GIGABYTE 890X A-UD3
Corsair TX650W PSU (650 watts)
Antec 902

I have the best cable managment ever in that case. Serious. I spend hours on it.
I also have the power supply mounted upside down in the case, since there is no cut-out on the bottom of the case to allow intake. So the intake fan is taking air from the inside of the case.\

Thanks!

 

[mosox]

Try this
http://www.tomshardware.co.uk/forum/261145-13-perform-steps-posting-boot-video-problems

Try some other SATA ports too.

 

[evongugg]

Check your GPU and CPU temps.
Check your values in CPU-Z.

 

[Bbpsword]

I went through the guide, and I can't definitively chalk it up to anything