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#1
hamamamama

hamamamama

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this isnt really a big problem and iunno if it even is a problem, my RAM is DDR 400 but when i boot up it says its running at 333.6 mhz instead of 400. my motherboard supports 400 so iunno why it would be lowered but can i change sumthing to make it up to speed?
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#2
Neil Jones

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What processor do you have?
The memory will only run at DDR400 if the processor is running at FSB 200Mhz. Otherwise it'll slow down.
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#3
Samm

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Welcome to G2G

There's a few possible explanations for this:

1. (The most likely) The speed the memory runs at is related to the base frequency that the processor etc runs at (also known as the FSB). For example, if your cpu runs at an FSB of 166MHz, then the chances are the memory will run at 333MHz because DDR multiples this FSB by 2. Some boards however will let you run the memory at a higher speed than the cpu FSB

2. The other possibility is that the system doesn't properly support 400MHz for the memory bus (even though it may claim to) - this can happen when the system has all the memory slots filled for example.

3. If you mix and match ram speeds (i.e DDR333 and DDR400) then the system will run them all at the lower of the two speeds.


The first thing to check is the FSB your cpu is supposed to be running at. To do this, you'll need to know exactly which cpu you have...
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#4
hamamamama

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yeah my processor is running at 200 mhz i checked it its an athlon X2 3800 bios sed 200 mhz. i have 2 sticks of DDR 400 so #s 1 and 3 arent the problems i guess my motherboard doesnt support it even though they say to. *shrug* if the motherboard doesnt suport it am i able to voerclock it safely?
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#5
Samm

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Out of interest, what motherboard (make & model) do you have?
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#6
hamamamama

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my mobo is a mach speed MSNV-939

http://www.tigerdire...e...&CatId=1569
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#7
Samm

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That's great.

I've had a look on Mach Speeds website for your motherboard and in the detailed specs they state the following:
'Maximum memory speed may decrease when both DIMM1 & DIMM3 are filled with double sided memory modules'

Assuming that you are using double sided memory modules, then this probably explains why the memory speed is only 333MHz. I suggest you try placing the modules in DIMM 1 & DIMM2 or maybe DIMM2 & DIMM4.
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#8
hamamamama

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awesome thank u so much i put the RAM in 3 and 4 now and im up at 400 again ty :) :) :)
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#9
Samm

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You're very welcome :)
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