
(HT enabled on all tests)
The most surprising thing here is that at 272FSB, 3:2 Mem ratio, a score of
5335 is achieved due to the memory only
being 181.33MHz! Looking closer, at 181MHz, you have a peak theoretical
bandwidth of 2900MB/sec, or 5800 in
dual channel mode. So in other words, we are hitting 92% of the peak
theoretical bandwidth, nothing short of spectacular,
especially when you consider that at 200/200 1:1 only 76% of peak theoretical
bandwidth is being reached. Reason?
Well first I thought maybe hyperthreading was holding back the CPU, but I
disabled it and the scores were identical.
It makes little sense why 181MHz with a higher async FSB beats out 190/184/200
either 1:1 or 5:4. In fact it is not too far
off from the 230 1:1 loose timing scores. The only thing I can think of is
that the P4's Quad Pumped 200MHz FSB or the
chipset isn't giving the memory close to the theoretical 6.4GB/sec it should be
getting.
-BoB