I want to be able to manually set the timings to 7-7-7-21. What should the System Memory Multiplier be? Right now, if I set at , the BIOS displays two numbers: 1066 1256. Why is it displaying 1066? Does the 1256 mean it is a little under-clocked (compared to the rated 1333)? The next available multiplier is , which yields 1570. I assume that would be overclocking the memory, if it normally would be 1333?
Should I leave the System Memory Multiplier at 8? Do I need to worry about upping the voltages? It is a workstation computer that will get a lot of very hard use. I want it to be completely stable.
The memory multiplier x the BCLK = your memory frequency.
So 157 x 8 = 1256. Your memory is rated at 1333 so it's not overclocked.
Shouldnt need to up voltages- 1.5v is typically your default which they're designed to run at. You can increase up to 1.65v without harming anything but you definitely shouldn't need to running at lower than the rated speed.
Most of the folks I know that OC turn turbo off and go for the highest stable speed that won't fluctuate like turbo does. Just a thought- as far as your memory question, you should be fine!
Ok, I see what I may have done wrong. There is a BIOS setting for "Extreme Memory Profile (X.M.P.) It was set to [Disabled]. When I set it to [Profile1], both numbers went to 1333. The memory multiplier went to "Auto", -BUT- my BCLOCK went back to stock. After adjusting that back to 157, now the memory frequency is displayed as "1333 1256", which seems like I'm back where I started except for the correct recognition of 1333.
Does the "Extreme Memory Profile (X.M.P.)" serve any useful purpose if you change the BCLOCK? Or should I just disable it and forget about it?