Ever since I purchased this computer, I would experience random lockups, and suffer from a motherboard that refused to aggressively clock my expensive Corsair memory. I would always set the memory to manual timings so I could get the best performance out of my system based on extensive testing. My results: anything tighter than 2.5-3-3-6 @ 400MHz and 2.7V would result in a flaky computer.
Then BIOS 1.2 came out (and now 1.33) and the performance modes were introduced, where a certain performance mode may override SPD values if the memory timings were not manual. I had found that I had to use the Ultra Turbo setting in order for the board to set CAS = 2 and remain @ 400MHz; if not, the memory would be down-clocked to 333MHz.
Of course the board wasn't stable at anything quicker than the settings above...
Out of sheer desperation, I decided to try the Ultra Turbo settings but this time with SPD enabled. Normally, the RAM timings would be set to something like 2.5-4-4-8, but the Ultra Turbo mode overrides that and sets them to 2-2-2-5.
Now, I've tried 2-2-2-5 all the way through to 2-4-4-8, and nothing was working when timings were manually set, other than the settings above. But the computer is running great; no lock-ups since around 5:30 last night with F@H running in the background. Memtest86 didn't show any errors either.
I wonder if the intel chipset has some dynamic memory lantency settings that work on boot-up or even run continuously? Personally, I wouldn't have thought my XMS3500C2 modules were up to snuff when running 400MHz @ such aggressive timings!
We'll see how this works out as time passes...
Then BIOS 1.2 came out (and now 1.33) and the performance modes were introduced, where a certain performance mode may override SPD values if the memory timings were not manual. I had found that I had to use the Ultra Turbo setting in order for the board to set CAS = 2 and remain @ 400MHz; if not, the memory would be down-clocked to 333MHz.
Of course the board wasn't stable at anything quicker than the settings above...
Out of sheer desperation, I decided to try the Ultra Turbo settings but this time with SPD enabled. Normally, the RAM timings would be set to something like 2.5-4-4-8, but the Ultra Turbo mode overrides that and sets them to 2-2-2-5.
Now, I've tried 2-2-2-5 all the way through to 2-4-4-8, and nothing was working when timings were manually set, other than the settings above. But the computer is running great; no lock-ups since around 5:30 last night with F@H running in the background. Memtest86 didn't show any errors either.
I wonder if the intel chipset has some dynamic memory lantency settings that work on boot-up or even run continuously? Personally, I wouldn't have thought my XMS3500C2 modules were up to snuff when running 400MHz @ such aggressive timings!
We'll see how this works out as time passes...
Facebook
Twitter