Formerly About Advanced Micro Devices Message Board

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Politics : Formerly About Advanced Micro Devices

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To: Gary Ng who wrote (53033)	3/20/1999 11:55:00 PM
From: Scumbria	Read Replies (4) of 1583156

Gary, What is so special about this K7 which can achieve something that DEC cannot, IBM cannot and Intel cannot ? The Alpha 21164 already runs at 700 Mhz in an old 0.35u process. Samsung is promising 1GHz by the end of the year. What K7 has that Intel and IBM don't, is a 3-cycle L1 cache lookup. P6, PPC, K6, M1 all use a 2-cycle cache lookup. There is not enough time to do address calculation, address translation, cache lookup, and cache array access in 2 cycles at 600+ Mhz. Alpha, Willamette, M3, K7 all are using >2 clocks L1 lookups. K7 and Alpha are the first to get there however. Scumbria

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