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To: Dave B who wrote (40140)	4/17/2000 7:43:00 PM
From: Scumbria	Read Replies (3) \| Respond to of 93625

Dave, Interesting slides. The Intel presentation shows the average latency on the 820 w/800RDRAM to be about 50% higher than the average latency on the Apollo Pro 133. The reason that the latency shoots up at 500 MB/S on the PC100/133 is because the memory is saturated with long bursts, causing delays for the next access. DRDRAM does not get saturated at 500 MB/S, so the effect is much less pronounced. DDR will of course have the same low latency as PC100/133, combined with the high bandwidth of DRDRAM, so the 500 MB/S wall will not affect DDR. In fact, the latency delta between DDR and DRDRAM should remain fairly constant at higher bandwidths. Scumbria