Memory clock frequency

mrjack

mrjack

VIP Member
Noticed the other day that CPU-Z says my FSB is 177.5MHz, which it should be. The problem is that the memory uses the same clock speed, so it would be DDR355. :P

Which it shouldn't be, cause I set the memory clock speed to DDR266 so that it doesn't use the same frequency as the FSB. So this would probably be what's causing the instability of the CPU when the FSB goes above 177.5MHz. Any solutions on how to keep the memory clock down? Cause it really doesn't want to work in the BIOS.
 
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yeah, i have a 512MB stick of DDR400 if your interested, im selling it for $20 as of now, because i have no use for it..

and to solve it the free way, flash your BIOS, and see if you can lower it again, do you know for a fact that your RAM is at DDR355? and also you already have a 500MHz overclock, you might already be at your ceiling...
 
Well when you set it to DDR266, it still overclocks when you raise the FSB. Is your memory DDR333 or DDR400?
 
Ku-sama said:
and also you already have a 500MHz overclock, you might already be at your ceiling...
Click to expand...

Yeah, but I wanna see if that's the case since the memory seems like it could be restricting the OC.

[-0MEGA-] said:
Well when you set it to DDR266, it still overclocks when you raise the FSB. Is your memory DDR333 or DDR400?
Click to expand...

I have 1 stick of PC2100 (Good quality, SpecTek, which uses Micron SDRAM) and 2 PC3200 sticks. And I would have expected the memory frequency to stay at DDR266 since I didn't change any other options in the BIOS when setting the memory speed. Seems like I was wrong.

And I decided to set the clock frequency lower and use better timings instead.
 
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Honestly if i were you, i would only use the PC3200 and then keep that at DDR333, and then overclock it. Or set it to DDR400 if your mobo/cpu support it.
 
My motherboard only supports DDR333 frequencys and unfortunately it's from October 2002 so no dual channel either, since dual channel was introduced in 2003. And I noticed that the system wasn't performing so well when only using the PC3200 sticks. But when I put in the old PC2100 I had lying around it performed better.
 
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mrjack said:
My motherboard only supports DDR333 frequencys and unfortunately it's from October 2002 so no dual channel either, since dual channel was introduced in 2003. And I noticed that the system wasn't performing so well when only using the PC3200 sticks. But when I put in the old PC2100 I had lying around it performed better.
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the Mobo doesnt have to support dual channel to support DDR400
mine supports DDR400 and not dual channel
but it depends on the CPU FSB
my processor is 133 FSB so it's downclocked to DDR333
i tried overclocking it to get DDR400
it was FSB 160 which made my processor go from 2800 Mhz to 3360 Mhz

i thought you might be interested to know that !
 
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I know that running memory at DDR400 doesn't require dual channel. I was just saying that my mobo doesn't support dual channel since he was suggesting that I only use the two PC3200 which would enable dual channel, if the sticks were in the proper slots, on other mobos.

And you do know that DDR333 is 166MHz, well to be exact 166.5MHz
 
I still think it would be better running your DDR400 at DDR333 speeds, and overclocking them then having them turned down to PC2100 speeds...
 
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