I am running 4 DIMMs of 4GB each (F3-12800CL9Q-16GBRL) (for a total of 16GB) along with a FX-8150 (3.6Ghz stock settings) on a GA-990XA-UD3 board with the latest F9 BIOS.
After troubleshooting since Monday I have come to the conclusion that all 4 DIMMs are without defects - and each DIMM slot on the motherboard is fine.
Testing any given stick in any memory slot on the motherboard produced over 14 hours (and many 100% passes with the latest version of memtest86+)
of error-free results.
The sticks are rated at 1.5V with timings of 9-9-9-24 2T at 1600Mhz.
The fine folks over at G.Skill also have a few threads stickied in their forums on how to properly configure these DIMMs for AMD users.
Over the course of the past week I have tried running these sticks at fail-safe speeds (1333Mhz or below and with rated timings and voltages)
, but no matter what configuration I try I still wind up with errors in memtest at some point and blue screens of death in Windows 7.
Yesterday I thought I may have finally gotten a break after trying the following configuration: - Note: even though the configuration belowl had voltages set to automatic, I have tried setting every setting manually, from timings to voltages and every combination in between without any luck.
BIOS SETTINGSCPU Clock Ratio [Auto] 3600Mhz
CPU NB Freq. [Auto] 2200Mhz
Core Performance Boost [Disabled] CPU Host Clock Ctrl. [Manual]
CPU Freq. (Mhz) [200]
PCIE Clock(Mhz) [Auto]
HT Link Width [Auto]
HT Link Frequency [Auto] 2600Mhz
DRAM E.O.C.P [Disabled]BIOS - VOLTAGES****************System Voltage Optimized****************
System Voltage Control [Automatic]BIOS - MEMORYCPU Host Clock Control [Auto]
Set Memory Clock [Manual]
Memory Clock [x6.66] 1333Mhz
DCTs Mode [Unganged]
DDR3 Timing Items [Manual]
1T/2T Cmd Tmng [2T]
CAS# Latency [9T]
RAS to CAS R/W Del. [9T]
Row Precharge Time [9T]
Minimum RAS Act. Time [24T]EDIT by Moderator for those who find the above text hard to read! DM
BIOS SETTINGS
CPU Clock Ratio [Auto] 3600Mhz
CPU NB Freq. [Auto] 2200Mhz
Core Performance Boost [Disabled]
CPU Host Clock Ctrl. [Manual]
CPU Freq. (Mhz) [200]
PCIE Clock(Mhz) [Auto]
HT Link Width [Auto]
HT Link Frequency [Auto] 2600Mhz
DRAM E.O.C.P [Disabled]
BIOS - VOLTAGES
****************System Voltage Optimized****************
System Voltage Control [Automatic]
BIOS - MEMORY
CPU Host Clock Control [Auto]
Set Memory Clock [Manual]
Memory Clock [x6.66] 1333Mhz
DCTs Mode [Unganged]
DDR3 Timing Items [Manual]
1T/2T Cmd Tmng [2T]
CAS# Latency [9T]
RAS to CAS R/W Del. [9T]
Row Precharge Time [9T]
Minimum RAS Act. Time [24T]
Another thing worth mentioning is that with C1E (Enhanced core halt I believe) and C6 states turned OFF I can get through memtest without errors for a night with all 16GB in. The only problem in doing this is that with C1E and C6 states off I get a very weird stuttering in my games. With C1E and C6 enabled (and risking BSODs after a while in Win7) This problem completely goes away and games/ 3d graphics are rendered properly.
I had a little hypothesis that the C1E and C6 options being on caused the CPU to fluctuate voltage often to save power and so gave the 4 DIMM's a hard time with stability. Maybe I'm totally wrong, in any case I just can't seem to find the magic configuration. For the past seven days I have slept, eaten, and tested different settings with this new build. I am completely convinced that this is just a matter of configuring the BIOS properly, and any help would be appreciated, thanks so much for reading!!
