OCZ Reaper HPC 4GB physical memory dump vista?

Ok just RMA my ocz Reaper HPC 4GB back to newegg,
Took 10 days to get back and doing the same thing,
Been getting physical memory dumps on vista,
The screen will turn blue and i have to turn the comp off and boot up again,
Was doing this with the last set of ram,
Ive ran vista memory test and they pass,
Then i ran it again and had errors,
Ive tried running each stick 1 at a time,
same thing happens as well,
Ran memtest86 on them and some errors came up,
I cant believe i will have to RMA this a 2nd time,
Anyone think it could be my mb or cpu,
Thanks,Chris
Im on vista 64 ultimate,
Here are my comp specs,
AMD Phenom II X4 940,
GIGABYTE GA-MA78G-DS3HP AM2+/AM2 AMD 780G HDMI ATX,
OCZ Reaper HPC 4GB (2 x 2GB) 240-Pin DDR2 SDRAM DDR2 1066 (PC2 8500),
msi 8800gt 512mb,
Seagate Barracuda 7200.10 ST3250410AS 250GB 7200 RPM SATA,
SAMSUNG 2433BW High Glossy Black 24" 5ms Widescreen LCD Monitor,

try manually setting the timings and vdimm

ObiWong said:

try manually setting the timings and vdimm

Click to expand...

you mean like voltage at 2.1 (stock) and entering timings 5-5-5-15/18?

chinese_lover said:

you mean like voltage at 2.1 (stock) and entering timings 5-5-5-15/18?

Click to expand...

That's correct.

To find out its the mb,
Because went and tried some one else ddr2 i got a hold of,
If u put 2 sticks in there at the same time,
It will not even boot up or beep or anything,
So only 1 ram slot out of 4 work on the mb it seems,