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RAM Frequency in CPU-Z doesn't match BIOS Settings

post #1 of 11
Thread Starter 
I have 2 double-sided, and one single-sided 512 sticks of DDR400 RAM. I noticed the other day that CPU-Z shows them running at 119MHz. My FSB is at 238MHz, if that matters. Anyway, In the BIOS, the memory frequency is manually set at 200MHz. My options are 200, 266, 333, and 400MHz. In my motherboard's manual, it says two double, and one single should run at 200MHz (Lame).

So, eh. ***?

Before I post, I just noticed that 238/2 is 119. Is there a setting for memory dividing in the BIOS? If I'm not mistaken, I should be able to run it at least at 1:1.

Edit: Also, in the BIOS itself, it says 100MHz for the Memory clock, and just a few lines under it lies the setting at 200MHz.

Delete this post if you will. If I set the value to 266, the DIVIDER (not the clock, as shown) is put to 133. This continues until it tops out the memory at the highest value possible without going over 200MHz for the Double-Sided RAM penalty. I'm now running it at 187MHz, and there's a noticeable improvement.
post #2 of 11
CPU-Z will always show your ram frequency at half of what the frequency is in the bios.

That is the whole dual channel thing i think...
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post #3 of 11
Quote:
Originally Posted by lavieinjuste View Post
CPU-Z will always show your ram frequency at half of what the frequency is in the bios.

That is the whole dual channel thing i think...
It has nothing to do with dual channel... it's all in the DDR abbrevation "double data rate"... meaning that manufacturers labels it as 400MHz while it really only is 200MHz.
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post #4 of 11
oh ok.
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post #5 of 11
DDR basically transfers 2 bits per clock, so it's effective speed is, say, 400MHz transferring 1 bit clock.

Your DDR400 should be running at 238MHz (DDR476). It looks like you have set your memory divider to 1/2
post #6 of 11
sorry if im kinda hijacking your thread but did you do anything to get you 3 sticks of ram working? ive got 3 sticks in as well atm a total of 2gb but my pc tells me ive only got 1.5 :/ (2x 512mb + 1x1gb)
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post #7 of 11
do you have four ram slots?

sometimes ram has to be put into the computer in pairs
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post #8 of 11
Just try swapping the sticks around at random. Put the 2 x 512 in same colored slots, so they run dual channel. Then put the 1 GB in another slot.
    
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post #9 of 11
Thread Starter 
Retaking my thread back.. So does that mean if it says my RAM is now running at 187MHz, it's actually running at 374MHz? That can't be good. O_O
post #10 of 11
Dividers on RAM is a pain...
The overall speed is not just dictated by the dafault speed when using dividers, there is an additional effect dependant on the CPU multiplyer.
What ever the RAW speed is actually at you then dubble it!
If you have a 200, 266, 333 and 400 selection in that BIOS its the "DDR" speed. So, if chose 200 the RAM is actually starting @ 100MHz and increasing approx. 1/2MHz for every 1MHz of the CPU OC.
    
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