Why memory Frequency is so Slow ?

[Mir96TA]

Originally posted by: Ozoneman
Your FSB of you cpu is 333. If you set at 1:1 you get 333:333(times2) because the ram is DDR2. So 1:1 then becomes 333:667. Your ram can't run at 800 with a FSB at 333 and your divider set at 1:1. Do you understand what I'm saying?

Like I said before, you need to not run at 1:1 and set your memory to "Auto" or 2.4X. This is the only way you can get your memory to 800 without increasing your FSB.

You also need to set that OCZ memory to 2.1 volts and the timings to 4,4,4,15 if you don't already have them set.

I am able to run memory 333 (1:1) {manual Mode}or 400(5:6) {fully Auto}with stock voltage. Timings are 4-4-4-12 (not 15)
So I dont think I need to Over Voltage.
What is the heights MEM Freq I can with Mobo and CPU; I might upgrade the memory?

 

[Mir96TA]

I think I get it now
I am running my Bus 333 Which is limition of my CPU (I think)
my Memory running at 400Mhz however since it running faster then Bus Speed
so Memory have to use divider so it would match my BUS speed ? (Cause bus speed is slow?)

 

[Ozoneman]

Right!

But your FSB is not running slow, it is running at the speed it is supposed to when running at stock settings. The 6850 has a FSB of 333 (333X4=1333). The 6850 can run a higher FSB if you overclock it from its stock speed. When you do overclock the cpu, your memory speed will go up with it.

 

[Peter]

Look dude, it's simple actually.

In Intel's architecture, there are TWO busses between CPU and RAM - the CPU FSB (between CPU and northbridge) and the RAM bus (between northbridge and RAM). They run at a certain ratio to each other.

So if you want your RAM at 400 MHz with a 333 MHz FSB, your FSB/RAM ratio will have to be 5/6. If you want 1/1 for whatever reason, then that means your RAM clock equals the FSB clock, whatever the latter is. So if you want RAM at 400 with 1:1 ratio, the only way to achieve this is to go buy a 400 MHz FSB processor.

DDR RAM (whatever generation) is double-pumped, so if it says "DDR2-800" on the box, it's 400 MHz.
Intel's CPU FSB is quad-pumped, so if it says "FSB1333" on the box, it's actually 266 MHz.

 

[Ozoneman]

Originally posted by: Peter
Intel's CPU FSB is quad-pumped, so if it says "FSB1333" on the box, it's actually 266 MHz.

Fixed:
Intel's CPU FSB is quad-pumped, so if it says "FSB1333" on the box, it's actually 333 MHz.

 

[Mir96TA]

I get it now
Sorry I was little Thick.
I didn't formulated DDr 2/3 (Quad Pump and etc) and having different bus speed
like FSB and Acutal BUS .......
THanks Guys