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To: Bilow who wrote (104324)	6/10/2000 8:43:00 PM
From: Mani1	Read Replies (1) \| Respond to of 186894

Carl re <<Total power computation for a typical mobile processor during hard use might be 20W. Of that, the processor will take the bulk. SDRAM memory would burn about 3W (at 500MB/sec bandwidth), with DDR at 1.5W and RDRAM at 1.7W. There isn't much difference between RDRAM and DDR. The savings is in the difference between those two and SDRAM. This would amount to something like 1.5W/20W = 7% power savings.>> It is hard to make general numbers like that. 15 inch screens and high performance graphics future together can do better than 10W by themselves. Some high end notebook are around 35 watts! The problem with RDRAM is that it is very "peaky". It can consumes as much as 4 watts at any given time and the problem is that the heat can be very concentrated on a small area. That means it requires heat spreaders which are a big "no no" in a compact note book design. Also the 4 watt peak requirement, would mean that a higher performance power supply/power management is required. All and all, RDRAM are a big head ache for a compact design like a note book, and unless there will be even a more substantial performance advantage (vs the one available on desktop), I do not see RDRAM in the notebook space. Mani