From: Smelly Pooh (plop at domain redbrick.dcu.ie)
Date: Fri 05 Jul 2002 - 16:11:49 IST
In reply to Niall O Broin's flatulent wordings,
> I'm in the middle of building a couple of boxes which use PC2700 DDR RAM. As
> I always do, I ran memtest overnight on the boxes which found me one very
> slightly dodgy RAM stick.
All PC 2700 DDR RAM is specced to run at 333 MHZ (since that is what's
required before you can call RAM PC 2700). The speed of the actual RAM
depends on 1) the clock speed and 2) the RAM timings, the 2.5-3-3 part
of your check. The most important timing is the CAS timing, in this
case 2.5. CAS 2 is faster (roughly 5%, sometimes more). If you are
using PC 2700 RAM make sure you have a motherboard capable of running
RAM at 333 MHZ.
Presumably you are building AMD boxes, if you have unlocked CPUs I'd
recommend you run the FSB at 166 MHZ, currently most new AMDs run at 133
MHZ by default and 333 MHZ RAM runs at a 4:5 DDR ratio (since 133 MHZ
times 2 is only 266 MHZ) meaning the CPU ends up not making use of a lot
of that extra bandwidth
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