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C2Duo Confusion

M

MrFace

2[H]4U
Joined
Feb 23, 2003
Messages
2,716
Am I seeing this right...that you can run CPU at 400mhz FSB, but run memory "1:1" at 800mhz(quad pumped)?

How does that work? Wouldn't that be 2:1 CPU:Mem????
 
i could be wrong but i think it's like this:

DDR is double data rate..

so the memory is at 400mhz (1:1) but it's "Effective" rate is 800mhz because it's DDR.
 
keldegar said:
i could be wrong but i think it's like this:

DDR is double data rate..

so the memory is at 400mhz (1:1) but it's "Effective" rate is 800mhz because it's DDR.
Click to expand...
Your right, the effective speed is double of the FSB. So I'm running 400 FSB using a 1:1 multiplier then the ram would be at 800mhz which is the effective speed.
 
MrFace said:
Am I seeing this right...that you can run CPU at 400mhz FSB, but run memory "1:1" at 800mhz(quad pumped)?

How does that work? Wouldn't that be 2:1 CPU:Mem????
Click to expand...

Yes & No.

Most motherboard manufacturers call it 1:1 in the BIOS.
Gigabyte actually calls it a 2:1 ratio to make it easier for people to calculate, but technically the ddr is running at 400Mhz Dual Data Rate (DDR) = effective 800Mhz.

You have to read carefully, b/c its not always stated the same in different BIOS's, etc.
 
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