OpenSUSE Hardware :: System Freeze - Diagnose Hardware - Memtest

I've been getting some system freezes when running blender on a new system (using about 1/2 my 8GB memory, AMD Phenom II x6 1090T+default AMD CPU cooler, ECS A880LM-M motherboard, Corsair 1333 DDR3, 2x4GB). PS voltages (measured off MOLEX plug) 12.05VDC and 5.2VDC. Tried BIOS resetting defaults. I'm trying to narrow down the problem with the MEMTEST v4.0. It gets through all tests fine until test #7 (block move) and starts throwing a ton of errors, and about 2/3 of the way through that test it says "unexpected interrupt, halting CPU0." All the listings say "28dbbd11" (this varies from run to run, except the 'Stack:' listing seems to count up from that number). I've tried unplugging one memory module and then swapping them as well as their positions. Same result always: block moves throw errors, followed by halting CPU0. To me this suggests the motherboard or the Phenom II. But I don't know how to test these. Can someone give the next step in diagnosis? I did find this link, but I'm not sure how it differentiates between my error and something specific to either the MOBO or CPU:

[code]....