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Politics : Formerly About Advanced Micro Devices -- Ignore unavailable to you. Want to Upgrade?

To: wily who wrote (38972)	10/12/1998 2:54:00 PM
From: Scumbria	Read Replies (1) \| Respond to of 1573020

the disk cache manager for Windows NT. It lends itself well to work with the bursty mode nature of Rambus. wily, Any type of operation which moves large blocks of data from one point to another can potentially benefit from high bandwidth bursting. Two notable examples are 1) DMA transfers which move blocks of data between the disk and main memory over the UIDE bus, and 2) DMA transfers which move texture maps from main memory onto the graphics card via the AGP bus. Neither of these has much to do with the CPU or the CPU bus. High bandwidth transfers can be accomplished with RDRAM (Rambus) or a wide SDRAM bus. The advantage that Rambus offers over SDRAM is that the transfer occurs on a narrow data path. The disadvantage is that it is expensive. The limitation with using Rambus for the disk cache is that the speed of the IDE bus limits the data transfer rate between the disk and main memory. Ultra IDE has a peak bandwidth of 66 MB/s, which can be saturated just fine by any SDRAM configuration currently in the marketplace. The presence of Rambus in a computer will not do anything to improve performance on CPU benchmarks. It may actually cause lower numbers because of the long latencies. When paired with the Intel processor cache to handle individual access requests I am starting to see why Intel has chosen Rambus to be the memory interface of choice, especially in the Windows NT environment. Pure jibberish from the RMBS thread! Scumbria