Constant Crashes

[Crimeodile]

Hey everyone, I'm getting constant blue screen errors on my relatively new build.

AMD Athalon 11X3 435
4 GB Patriot G-Series DDR PC2-6400, 800MHZ
Rosewill 500W PSU
XFX RADEON HD 5770

Basically during gaming, or anything else resource intensive I will get a blue screen that says IRQL_Not_less_or_Equal. Most of the dumps point at ntkrnlpa.exe as the culprit. I've tried switching out the ram and I get a little more stability, but it still eventually happens. Any ideas?

[Crimeodile]

Forgot to mention the motherboard is a BIostar TA7865GE 128m and I already disabled the onboard graphics.

[Raging Hamster]

Did you run a memtest?

Are your BIOS settings at stock or are you overclocking?

This is a reprint of a MaximumPC article about decoding Bluescreens. I have linked this one because it is easier to scoll one page then to load mulitple pages for all the info. (http://www.taranfx.com/understanding-and-decoding-bsod-blue-screen-of-death-messages)

[Crimeodile]

Bios is at stock.
I ran MemTest for 4 hours and didn't get any errors, maybe I should run it longer?