ASUS P7P55 WS and G.SKILL F3-12800CL9D-4GBNQ

[lcole]

I have the following system:

ASUS P7P55 WS SuperComputer
Intel Core i7-860 Lynnfield 2.8GHz LGA 1156
G.SKILL F3-12800CL9D-4GBNQ X2 (Total 4 Sticks)
Windows 7 Pro, 64bit

I am having random blue screens that cannot be repeated. Sometimes I will have two or three in one day and then none for a week+. Most memory texts (MemTest86+) have been fine for 10+ cycles. However I did have memory errors the other day for the first time. The errors were from Test 6 - Moving Inversion and test - 7 Random Number Sequence. In the 5000MB and 6000MB range. All were Error Bits "00010000". I powered down the computer and I swapped the DIMM's in A1 and A2. The errors are gone again and have been for a few days. Blue screens have been BCCodes 1a, 4e, 50 and others.

I have a few questions.

1) is the G.SKILL F3-12800CL9D-4GBNQ memory OK for the ASUS P7P55 WS MB? The original manual that came with the MB lists this memory however the most recent QVL does not but F3-10666CL8D-4GBHK, F3-15000CL9D-4GBTD and F3-16000CL9D-4GBTD are.

2) if the memory is compatible - what BIOS settings should I try.

Thank you in advance for any assistance you can provide

[Tradesman]

Could you post your current BIOS settings, if you are mainly on auto guessing your tRFC might be low

[lcole]

Good Morning...

G.SKILL tech support provided some BIOS settings for me to try yesterday afternoon. These are listed below. It will be a few days before I am positive the changes are working.

As for tRFC which I think is REF Cycle Time in my BIOS is set to Auto and the current value is 88.

AI Overclock Tuner - Manual
CPU Ratio Setting - 21.0
BCLK Frequency - 133
DRAM Frequency - DDR3-1600MHz

DRAM Voltage - 1.60V
CPU PLL Voltage - 1.90V

DRAM Timing Control (submenu)
CAS Latency - 9
RAS to CAS Delay - 9
RAS PRE Time - 9
RAS ACT Time - 24

DRAM Timing Mode - 2N
All others AUTO

[GSKILL TECH]

Those settings should work. Keep us posted on the results.

Thank you
GSKILL SUPPORT