Took a side by side screenshot of my 12x mem multi DDR3-2184Mhz 7-8-7-20 1T 32M run versus my 10x mem multi higher cpu clocked DDR3-2118Mhz 7-8-7-20 1T 32M run to see what cputweaker reported for my subtimings. See if any subtiming settings are a factor.
http://fileshosts.com/intel/Asus/P6T..._1092mhz_2.png
DDR3-2184Mhz (12x mem) vs DDR3-2118Mhz (10x mem)
- QPI/DRAM volts = 1.55v vs 1.6375v due to lower bclk needed on 12x mem config
- tRFC = 110 vs 88 could be a factor ?
- tRRD = 7 vs 7 both same
- tREFI = 955 vs 849
- tFAW = 37 vs 33
- tRTL A channel = 56 vs 57
- tWTP = 27 vs 26
- tRTP = 7 vs 6
- Write to Read (same rank) = 20 vs 19
Going to play with subtimings and see :)
Update: Dropped cpu multiplier to 19x and using 10x memory multiplier, will try to reproduce similar looser subtimings as used in my DDR3-2184Mhz 7-8-7-20 1T run with 12x memory multiplier. I managed to get as far as Super Pi 32M stable @DDR3-2188Mhz 7-8-7-20 1T at 1.84v vdimm :)
Manually set following subtiming values in bios:
- tRFC = 110
- tFAW = 37
- Back to Back CAS# Delay = 4 (tightened to try and offset loosened tRFC value)
- Write to Read (same rank) = 20
Super Pi 32M passed at:
- DDR3-2158Mhz 7-8-7-20 1T at 1.72v
- DDR3-2167Mhz 7-8-7-20 1T at 1.78v
- DDR3-2177Mhz 7-8-7-20 1T at 1.80v
- DDR3-2188Mhz 7-8-7-20 1T at 1.84v
DDR3-2158Mhz 7-8-7-20 1T at 1.72v
http://fileshosts.com/intel/Asus/P6T...8m32s407ms.png
DDR3-2167Mhz 7-8-7-20 1T at 1.78v
http://fileshosts.com/intel/Asus/P6T...8m29s891ms.png
DDR3-2177Mhz 7-8-7-20 1T at 1.80v
http://fileshosts.com/intel/Asus/P6T...8m27s843ms.png
DDR3-2188Mhz 7-8-7-20 1T at 1.84v
http://fileshosts.com/intel/Asus/P6T...8m25s593ms.png