My DDR3 RAM is rated at 1333MHz, 9-9-9-20 1.65v. In order to reach this speed at my current CPU-ratio (which I believe I can't adjust on my mobo?), I need a speed of 3.33Ghz - base clock of 166.625MHz.
Currently my DDR3 is running at 1066MHz, 7-7-7-16 1.5v with my i7 at 2.66GHz - 133MHz base. (normal multiplier at x20)
What are some good latency settings to run it at if I set my i7 to 3.0GHz - 150MHz base, or 3.2GHz - 1.6MHz base?
I'm not to familiar with DDR3 latencies... Would say 8-8-8-18 work? Or 8-8-8-19? Currently my system fails to post correctly at wrong RAM settings, so I'd like to get it right on the first try to avoid any hassle.
*If this belongs in the RAM section, plz move it there, thxs.
Isn't memory speed determined by UnCore and memory multiplier on Nehalem?
If your Bclk is at stock 133 then change UnCore to 20 and Mem multi to 10 and you get your 1333MHz RAM.
As far as latencies go, it's all going to be down to the RAM itself, so it's difficult to say "yes, those timings will work".
Doesn't your motherboard have an auto correction on it, or at least a clear CMOS button? If your timings don't work then it should just sort itself out on the next POST to where you were before.
What's your RAM? See if you can find some reviews for it and see what testers have got it running at. To be honest though, outside of a synthetic speed and timings aren't making much of a difference. At 1333MHz you could get away with 7-7-7-20 1T, but it's dependant on the chips as always.
Personally I'd keep the RAM at 1.65V and see how tight you can go, then see how low the voltage can go when you're tight.
the 4th one is TRAS - Row Active Time
"The number of clock cycles required between a bank active command and issuing the precharge command. This is the time needed to internally refresh the row, and overlaps with TRCD. Typically approximately equal to the sum of the previous three numbers."
So I presume you match it to the sum of whatever you set the other 3 values to, make sure it's stable and then maybe drop it a little.