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post #11 of 18
hmm that all makes a bit more sense now. lol Although it still doesnt help me with my divider problem back at home. I hope this all helps you killer.
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post #12 of 18
Thread Starter 
yeah, now I know how a divider works, but I still don't know how to set it correct.. or even enable it
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post #13 of 18
You will want to set a divider only if your are running a high fsb, it's pretty easy to calculate it, proportions.

Per example, the DDR333 divider is actually 333/400 or 166/200(DDR, double data rate, don't forget) , say your FSB is 250, just find the X in the following equation :

Code:
 166      X
----  =  ----
200      250
250 x 166 / 200 = 207 , resulting RAM frequency would be 414 (2x207) .. it's all basic proportions. Have fun
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post #14 of 18
Thread Starter 
Quote:
Originally Posted by SHaCK View Post
Code:
 166      X
----  =  ----
200      250

I don't get the 166/200

and I can't set the ram frequency manual

nice code afterall
too bad I'm a noob
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post #15 of 18
With DDR (Double data rate ) ram, the memory frequency is doubled. DDR400 per example is actually 2 x 200mhz. If you ever noticed, that's why CPU-Z shows 200mhz for DDR400.

The 166/200 is what the DDR333 divider really is. DDR333 divider = 333/400
Since the real frequency is 200 and not 400, 333 / 2 = 166. So 166/200.

DDR400 divider is actually 1:1 right, but is your FSB really 400 ? Obviously not, it's 200 so 1:1.

if you are not confortable with this you still can multiply your FSB by 2 just to do the equation ( just to keep the right proportion ) ..

Code:
 166      X
----  =  ----
200      250     

Resulting RAM freq = 207 x 2 = 415mhz.
OR

Code:
 333      X
----  =  ----
400      500

Resulting ram freq. = 416mhz
Note that the 1mhz of difference between the two is because 166 is rounded.

Don't know if i'm clear, i'm terrible at explaining that kind of stuff..
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post #16 of 18
Thread Starter 
nono, it is fine,

but:

I have 4 double sided ddr400 so my mb only reads them ddr333,
my fsb is 218 (x11)
and my memory frequency is 171

so do the mat:
218x166/200=181! I only have a frequency of 171?
how come?
can you find a new formula?
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post #17 of 18
Some motherboards/divider are a little bit off, i don't how they exactly calculate the resulting frequencies :S

But at only 218fsb you could try the DDR400 divider, that'd make you ram run at DDR436. Depending on what ram you have you should be able to easily achieve that by raisin the vDIMM a bit and/or lowering the timmings.

What's your ram ?
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post #18 of 18
Thread Starter 
Quote:
Originally Posted by SHaCK View Post
Some motherboards/divider are a little bit off, i don't how they exactly calculate the resulting frequencies :S

But at only 218fsb you could try the DDR400 divider, that'd make you ram run at DDR436. Depending on what ram you have you should be able to easily achieve that by raisin the vDIMM a bit and/or lowering the timmings.

What's your ram ?
it is already at ddr400

I'll see if I overclock further with my arctic freezer pro
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