Please take a look(cpu -ram issues)any help will be apreciated.

[evzonas]

Hello

I am really confused and trueely need some answers.
I know that if i set the fsb to ram ratio (1:1).I am going to need fsb to run exactly to the same ram frequency.IF i am going to have an FSb of 1333/4=333mhz means i am going to need a ram that has clcok freqeuncy 1333/2-667mhz.AM ri right?.Someone told me that ram frequency must be 2 time s the FSB.iS HE RIGHT?.tHAT MENAS 333mhz fsb need 667 mhz ram to fully wotk at 1:1.Practically a fsb of 1333mhz need a 1333 ram modules.

Please tell me if i undertsand right and let me know a.s.ap

Mike

[Squeetard]

yep.

I'm running a 400 FSB, at 1:1 my ram would be 800mhz. I run a 5/4 ratio though and ram is 1000mhz

[MpG]

With a FSB of 333MHZ, your 1:1 ratio will have your RAM at 667MHz. Because the RAM is Dual-Data-Rate, it's actually running at 333MHz as well (333-actual x 2 = 667-effective). Thus, the FSB is actually equaling the true memory speed, hence the "1:1 ratio".

[evzonas]

that menas my corsair TW3X4G2000C9DF which is run at 2000mhz,has frequency 2000/2 and i am going to need 500 fsb insted of 333fsb of my q9550.Am i right?

[evzonas]

Thanks again mike

[MpG]

I think you're correct, if I'm reading that right. In this case, what you'd be looking at is a system with a FSB of 500MHz. With your memory however, that 2000MHz is an effective speed, with the the "real" speed being 1000MHz, so what you'd run to get that is a 1:2 ratio.

[evzonas]

Man i think is the effective frequency!!!

Please give me an answer 100% correct it really make diference.!!!

[MpG]

No, if that's the model number for your RAM, then yes, my above description is correct. DDR3 runs at much higher frequencies than DDR2, which is when that 1:2 ratio becomes useful.

In all seriousness, you can expect a pretty hard time getting that Q9550 stable at 500FSB, assuming it even boots. Quad-cores simply don't handle high FSB's very well. But even 450FSB will let you run that memory at 1800MHz, which is still pretty damn fast.

[Oversized Rooster]

Originally Posted by MpG

In all seriousness, you can expect a pretty hard time getting that Q9550 stable at 500FSB, assuming it even boots. Quad-cores simply don't handle high FSB's very well. But even 450FSB will let you run that memory at 1800MHz, which is still pretty damn fast.

Agreed. I don't think you'll get to 500FSB unless you employ water cooling. With my Q9450 I can do 450FSB but the temperatures are very high even with a Thermalright Ultra 120 Extreme. And by the time you're above 400FSB you will need to increase the CPU voltage (and chipset among other things) exponentially.

[evzonas]

Hello guys and thanks for the replies.
Due to i am totally new on Intels mobos i would be glad if someone tell me how to change the fsb-ram ratio and fsb via bios.
I could not find these settings in the bios.

REagrds
Mike