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Old July 24th 06, 04:59 PM posted to alt.comp.hardware
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Default 800MHz DDR2 single channel vs 667MHz DDR2 dual channel...


KILOWATT wrote:
Hi everyones...thanks to read.

Two basic questions i could not get an answer after 1 hour of checking old
posts:

1- Since most Pentiums 4 CPUs sold are with a 800MHZ FSB, it is correct to
assume that the ram will always be a bottleneck unless i use the newer
800MHz DDR module?


I don't think so. p4s use QDR (Quad data rate) to come up with the true
FSB rating. Their real FSB rating on a "800" MHZ chip would be 200MHZ.
if it took DDR it would be DDR 400 (pc3200). There is no such thing as
QDR SDRAM, at the moment. Not on the Commercial PC market anyhow. There
IS QDR SRAM, however.


2- If i use two 667MHz matched pair modules in dual channel, will the ram
fsb will still be a bottleneck compared to the 800MHz cpu fsb?


See above. There is often a performance boost for Dual channel, BUT....



TIA for your reply.


--
Alain(alias:Kilowatt)
Montréal Québec
PS: 1000 excuses for grammatical errors or
omissions, i'm a "pure" french canadian! :-)
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