F2-8500CL5D-4GBPK x2 Problem

[Desrick]

I can not get it to run at 1066. I'm running a Phenom 2 940 on a DFI LanParty DK 790GX-M2RS motherboard. The memory is listed by DFI as useable with 4 sticks. I have tried manually setting the timings in bios and I get errors in memtest.

CPUz says the following for 1066 :

CAS# Latency 5.0
RAS# To CAS# 5
RAS# Precharge 5
tRAS 15
tRC 48
Command Rate 2T
Voltage 2.100 V

It does run at 800 with all settings on auto

[Tradesman]

Have you tried the sticks individually annd run memtest, if you get errors running all four, isolate the one (or more) producing the errors.