F2-8500CL5D-4GBPK comptible motherboard list --4/15/08 updated--

[Spyrus]

http://www.xtremesystems.org/forums/...postcount=5537

This might be helpful. For 2x2GB sticks try the combinations for PL=tRD=8 first and then try for PL=7.

You have many auto values.
Try these:

Ai Overclock Tuner : Manual
OC From CPU Level Up : AUTO
CPU Ratio Control : 8
FSB Frequency : 266
FSB Strap to North Bridge : 266
PCI-E Frequency: 100
DRAM Frequency: DDR2-1066
DRAM Command Rate : 2T
DRAM Timing Control: Manual
CAS# Latency : 5
RAS# to CAS# Delay : 5
RAS# Precharge : 5
RAS# ActivateTime : 15
RAS# to RAS# Delay : AUTO
Row Refresh Cycle Time : AUTO (Really that will do it you can check that with memset or bios if is 52)
Write Recovery Time : AUTO
Read to Precharge Time : AUTO

Read to Write Delay (S/D) : AUTO
Write to Read Delay (S) : AUTO
Write to Read Delay (D) : AUTO
Read to Read Delay (S) : AUTO
Read to Read Delay (D) : AUTO
Write to Write Delay (S) : AUTO
Write to Write Delay (D) : AUTO
DRAM Static Read Control: Disabled
Ai Clock Twister : Light
Transaction Booster : Disabled
Level : 2

CPU Voltage : AUTO
CPU PLL Voltage : AUTO
North Bridge Voltage : 1.55V
DRAM Voltage : 2.0
FSB Termination Voltage : AUTO
South Bridge Voltage : AUTO
Loadline Calibration : AUTO
CPU GTL Reference : 0.63x
North Bridge GTL Reference : 0.67x
DDR2 Channel A REF Voltage : AUTO
DDR2 Channel B REF Voltage : AUTO
DDR2 Controller REF Voltage : AUTO
SB 1.5V Voltage : AUTO

NB LED Selection : NB Volt
SB LED Selection : SB Volt
CPU LED Selection : CPU Volt
Voltiminder LED : ENABLED

CPU Spread Spectrum : Disabled
PCIE Spread Spectrum : Disabled

But you will have more luck especially with strap 333 and divider 5:6 bringing memories on 1000+. Put definitely auto at tRFC.