Boot problems, Memory failure? HELP!

[Anzy]

Hey guys, having an odd problem with my rig last few days and I'm at a stand still right now. Basically I was getting stop errors (0x00000050, 7E, etc) and I tried to reformat,no go. So I was testing things and after I pulled my TV tuner card out I was able to finish the Vista setup but then the problems came back again. I ran each stick separately under memtest, each module failed miserably in less than a minute. I'm thinking thinking that either the memory is truly bad (Though this setup ran flawlessly since August), the motherboard DIMM slots died, the power supply is dying or the memory isn't getting enough voltage. I'm by no means an expert and these conclusions are only based off my limited knowledge.

Voltages:
VcoreA: 1.30 V
Vcore2: 2.03 V
+3.3V: 3.38 V
+5V: 5.89 V
+12V: 4.61 V
DDR Voltage: 0.13 V
+5V Standby Voltage: 5.12 V

These readings are from a third party boot disk that has a bunch of utilities on it as I was unable to locate the section in the BIOS that has these readings. Do those voltages look good? At the moment I'm quite lost so, please, any help would be greatly appreciated! Thanks!

System Specs:
mushkin 4GB(2 x 2GB) 240-Pin DDR2 SDRAM DDR2 800 (PC2 6400) Dual Channel Kit Desktop Memory Model 996564
GIGABYTE GA-G33M-DS2R LGA 775 Intel G33 Micro ATX Intel Motherboard
Western Digital Raptor WD1500ADFD 150GB 10,000 RPM Serial ATA150 Hard Drive
EVGA 640-P2-N825-AR GeForce 8800GTS Superclocked 640MB 320-bit GDDR3 PCI Express x16 HDCP Ready SLI Supported Video Card
Intel Core 2 Duo E6750 Conroe 2.66GHz LGA 775 65W Dual-Core Processor Model BX80557E6750
CORSAIR CMPSU-620HX ATX12V v2.2 and EPS12V 2.91 620W Power Supply

Thanks again!

[Anzy]

Update: I tested a different power supply and still had the memory fail, not sure what else to do now... It's either the motherboard or both memory modules... which do you guys think it is? Thanks!

[[XC] Synthetickiller]

Do you have another mobo that you can test the ram in or a friend who has one?

Thats one way to see if the ram is the problem.

As well, you could drop in other ram to see if it works.

Sounds to me like the ram if it boots up at all. I could be totally wrong though.

[Anzy]

I don't have another motherboard unfortunately, same with RAM... Thanks for the help, but does anyone else know if it may be the motherboard itself? I did try switching the memory to the other slots with the same results so I'm leaning on it being the memory, but still not 100%.

[Northwood]

buy a cheap single 256mb stick and see if that gives errors also, if not then it's the RAM.