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Intel P35 Express, FSB1333 and DDR3
by Marc Prieur
Published on June 6, 2007

FSB1333 vs. FSB1066, Core 2 E6850
The P35 Express is the first chipset to officially support FSB1333, however, we do have to say that this frequency is already supported by almost any decent chipset. So what does FSB1333 add in terms of performances ? Here are some tests in 2.66 GHz :

If memory bandwidth takes off with gains of around 18%, practical performances are only slightly affected at 0.8 to 1.2% in WinRAR and 1.7 to 1.9% with Far Cry.

Actually, the most interesting thing about E6x50 processors expected out in mid July aren't really their FSB, but rather their price ($266 for the E6850 at 3 GHz) as well as the characteristics of new G0 stepping. We were able to get our hands on a sample of one of these processors and they do look promising.

The first thing to notice is that the processor’s in load consumption measured with an ammeter on the ATX12V decreases 10 watts compared to the X6800. The second point is that this processor is very at ease in overclocking as we were able to attain a stable 9x375 Mhz while at the same time keeping a VCore of 1.325V. For those who are wondering, at equivalent frequencies the performances of this new stepping don’t change at all.

The only negative point is the E6850’s increase in FSB. Our sample processor was limited at around 450 MHz, which is a very low value. It’s a known fact that all Core 2s don’t have equal FSBs, but this allows us to see that an official « FSB1333 » processor doesn’t necessarily let us go higher than a « FSB1066 ».

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