conroe fsb:dram ratio

chrone

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Aug 6, 2006
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which one is the best for conroe processor overall performance:
the fsb:dram 1:1 ratio or the 2:3 ratio??

eg.: 266mhz cpu fsb : 266mhz dram or 266mhz cpu fsb : 800mhz dram.

thanks in advance.. :)
 

mr_fnord

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Dec 20, 2005
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at stock 266Mhz:
1:1 = DDR2-533
2:3 = DDR2-800

With an e4x00 series @ stock 200Mhz:
1:1 = DDR2-400
3:4 = DDR2-533
2:3 = DDR2-600
1:2 = DDR2-800

As you can see, if you multiply the FSB by the ratio then double it you get the DDR rate:
266 * 1.5 (2:3) = 400 * 2 (Double Data Rate) = DDR2-800

Faster is always better, unless some component can't handle the speed. So, if you have a stock setup with stock clock speeds and DDR2-800 RAM, use 2:3. 1:1 will slow down your memory by 33%. If you're overclocking, you will probably have to lower your ratio in order to max out your CPU. See the Overclocking/CPU section and read wusy's guide.
 

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