Memory Unstable - fails memtest & prime95

[tie23he]

My ram: http://www.gskill.com/products.php?index=243
CPU: core i5-750 OC'ed 4ghz

Was getting BSOD because of MEMORYMANAGEMENT when everything was stock.
So i changed in BIOS to manufacturer specs.
I set voltage to 1.6v
I set timings to 7-8-7-24 2N

fails PRIME95 blend test in 3 seconds.
fails memtest.

I then went into BIOS and underclocked to like 1132mhz
made timings 9-9-9-27
I thought loosening timing make more stable.
still failing prime95 and memtest.
I even reseated ram and switched sockets too.



If I return everything to stock and change to manufacturer specs and ram cant pass memtest and prime95, then do I have faulty RAM and need to RMA?

[Tradesman]

Not sure what mobo you have, but might ensure you have the latest BIOS, enable XMP and set speed to 1600 and see what happens

[tie23he]

Mobo: ASUS p7p55d-e pro

I enabled XMP and still fails BOTH prime95 and memtest.

[GSKILL TECH]

Test one at a time to see which may be bad. Send them in for RMA and a replacement kit should work better.

Thank you
GSKILL TECH