5:4 or 3:2 ratio?

Microsoft Windows vista ultimate 64-bit
March 25, 2010 at 09:49:06
Specs: Vista Ultimate x64, Core2Quad Q9300 6G
so a question about theoretical performance gains:

if i link my FSB:RAM ratio and leave the FSB at 1333, which ratio should theoretically yield better performance, 5:4 (1333:1066) or 3:2 (1333:888)?

Thanks


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#1
March 25, 2010 at 11:41:17
The ratio is generally based on frequency, not FSB or DDR ratings. And the optimal ratio for Intel Core 2 based systems is either 1:1 or 1:2.

1333MHz FSB = 333MHZ frequency, so the RAM should run at either 333MHz (DDR667) or 667MHz (DDR1333).


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#2
March 25, 2010 at 18:38:45
"5:4 (1333:1066) or 3:2 (1333:888)?"

1333:1066 is not 5:4, it's 333:533 = 5:8

1333:888 is not 3:2, it's 333:444 = 3:4

Of the two, the 5:8 ratio will offer the better performance, but why not configure the ratio correctly at 1:1?


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