Question about memory speeds/ ratio/ and the math involved...

[nippyjun]

I have an evga 680i, memory unlinked and set to 1066 (8500c5d memory). I have been slowly increasing the FSB and stability testing the system. I have the FSB (QDR) currently at 1334, multiplier at 9 for a cpu speed of 3.0.

When i check the actualy memory speed in cpuz it says 1048 (524x2) and a ratio of 7:11. What math do i do to figure out how to set the memory speed so that it is actually 1066. I know that i can just up the memory speed setting a few mhz at a time until the actual speed is 1066, but i wanted to know how i use the ratio to figure out the speed.

Also, how do i know what memory ratio will be used when i choose a cpu fsb (even though i chose unlinked).

Thanks.

[hirantha]

i'm trying to figure this out too, cuz i'm having a brain fart trying to get my RAM & CPU to run 1:1

so 1334/4 =333 that means your RAM has to be 333*3 which is 999 maybe 1Ghz now thats i believe 2:3 ratio in order for 1:1 i think we have to run at 666Mhz of RAM

i'm not sure can anyone clarify this while i enjoy my brain fart :D

ok my brain fart is slowly clearing the air, i believe what i said up there is correct.. now lets say if you run your Proc at 420 which is 420*4 = 1680Mhz BUS now in order for the memory to run at 1:1 it has to be 420*2 = 840Mhz
I wonder if we can gain any performace running at 1:1

[nippyjun]

What i'm seeing is that the computer looks at your fsb, and then at the speed that you have chosen for the memory and then used a ratio that gets the memory the closest to that speed.

It's not truely unlinked when you choose unlinked.