The basic idea is to run your memory, whatever type it is, at a frequency that is 1:1 to your CPU FSB. In short, this helps reduce the CPU (or memory) having to wait on the bus for the next piece of information. In many cases, by running your memory synchronously, but at a moderately lower FSB frequency, you can get better performance. Plus, at a lower speed you can generally tighten your memory timings to make it even better.
So if your desired FSB = 350 DDR
DDR2 would ideally be running at: 350 (memory clock rate, DDR) × 2 (for clock bus multiplier) = 700
DDR3 would ideally be running at: 350 (memory clock rate, DDR) × 4 (for clock bus multiplier) = 1400
This is my biggest problem.... When I'm trying to setup 4.5Ghz my Q9770 memtest86 fail my memory....
This is my serious problem because i have past memtest86 and prime 100% with this spec::
Intel core 2 quad 9770 3.2Ghz @4.4Ghz (11*400) 1600Mhz ( 1.52500V)
Asus striker II nforce 790 ultra sli 1600Mhz
Ocz 2*1GB 1600Mhz 9-9-9-24 (2.20V)
cpu:: 1.52500V ( water - 60C)
CPU PLL::: 1.80V
CPU VTT:: 1.50v
NB v:::::: 1.92V(water 30C-35C)
SB v:::::: 1.75V(water 35C)
Load line calibration:: Enable
CPU Internal Thermal Control:::: Disable
Limit CPUID MaxVal::::: Disable
Enhanced C1 (C1E):: Disable
Execute Disable bit::::::Enable
Virtualization Technology:::::: Enable
Enhanced intel SpeedStep(tm)::: Disable
Also i had disable all the protection temp from motherboard and i had
flash it at the last version of bios....
Whats going wrong???
If i set 1Mhz up, i have blue screen and fail on memtest86
The most stranger thing is that i have managed to set my memory something like this......
9-9-9-26 (T1) 1800Mhz 2.30V ( red line Volt)
and start-past on 4.7Ghz (450*10.5) but fail my CPU at SuperPi on 32MB
also at 1MB on SuperPI its stuck at 18 interations with 9.5 seconds... if i try to set other frequency i get fail on memtest and blue screen... death cpu???
or something going wrong with my ram??
I need help, i want at least to work at 4.6Ghz if it possible, if it's not i will be proud to run my cpu at 4.5Ghz....
At the and i forgot to say that i try to change +mV on my ram without results and i uses linked and unlinked mode with all the options that my motherboard gave me..... Guess what!!!???
Nothing change... If you have any other information about this motherboard - cpu and ram ( 2*1GB OCZ 1600 Mhz 7-7-7-21 current volt 1.90V)
Please let me know....
All my system works with water and i can't get 4.5GHZ WITH Extreme motherboard and extreme CPU