PSU: seasonic X-series 650W
Mobo: Asus P5Q
CPU: E6750
RAM: Corsair twin2x2048-6400C4 (2x1024), G.Skill PI-B 4 GB (rated for 800mhz CL4) (2x2048), DDR2
Video: nvidia GTX 480
cooling: water on cpu and gpu
ok, so this box was running fine (fully stable) ever since I added the G.Skill ram, at memory config of 5-5-5-18 (the default) 475 Mhz FSB, but not so long ago I decided to experiment trying to get more performance out of the memory system (not just the memory itself but also the NB), I accidentally discovered that I could have a lower tRD (9 compared to 10) (NB latency aka "performance level") if I set my ram to 4-4-4-12, the difference between tRD10+5-5-5-18 and tRD9+4-4-4-12 is roughly 8% (~500 MB/s memory bandwidth improvement and about 7 ns (16-17 clocks) latency improvement).
this change required removing the G Skill because it couldn't handle the load, the corsair seems to be doing fine at 2.14V (475 FSB 4-4-4-12) on the other hand, but maybe only seems: in principle metest 86+ doesn't report any errors, there are BSOD's: PFN_LIST_CORRUPT, I have ran prime95 blend and after 2 hours it encountered an error.
so the questions I have for you are:
do you recommend using only 2 GB of ram over 6 GB of ram for the 8% improvement in memory system performance ? (I am using x86 OS)
what do you think is the problem being caused by ? is it the NB not able to handle the 333 Strap + tRD 9 or is it the memory not able to do 950 Mhz + 4-4-4-12 ? do you recommend trying more voltage ? (there is no cooling problem on the ram, I have a good fan on them)
Mobo: Asus P5Q
CPU: E6750
RAM: Corsair twin2x2048-6400C4 (2x1024), G.Skill PI-B 4 GB (rated for 800mhz CL4) (2x2048), DDR2
Video: nvidia GTX 480
cooling: water on cpu and gpu
ok, so this box was running fine (fully stable) ever since I added the G.Skill ram, at memory config of 5-5-5-18 (the default) 475 Mhz FSB, but not so long ago I decided to experiment trying to get more performance out of the memory system (not just the memory itself but also the NB), I accidentally discovered that I could have a lower tRD (9 compared to 10) (NB latency aka "performance level") if I set my ram to 4-4-4-12, the difference between tRD10+5-5-5-18 and tRD9+4-4-4-12 is roughly 8% (~500 MB/s memory bandwidth improvement and about 7 ns (16-17 clocks) latency improvement).
this change required removing the G Skill because it couldn't handle the load, the corsair seems to be doing fine at 2.14V (475 FSB 4-4-4-12) on the other hand, but maybe only seems: in principle metest 86+ doesn't report any errors, there are BSOD's: PFN_LIST_CORRUPT, I have ran prime95 blend and after 2 hours it encountered an error.
so the questions I have for you are:
do you recommend using only 2 GB of ram over 6 GB of ram for the 8% improvement in memory system performance ? (I am using x86 OS)
what do you think is the problem being caused by ? is it the NB not able to handle the 333 Strap + tRD 9 or is it the memory not able to do 950 Mhz + 4-4-4-12 ? do you recommend trying more voltage ? (there is no cooling problem on the ram, I have a good fan on them)