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To: Dan3 who wrote (104841)6/24/2000 4:21:00 PM
From: Scumbria  Respond to of 186894
 
dan,

Surprise! External Data and cache paths for Pentium, Pentium II, Pentium III, Cyrix, K6, K6-2, Celeron, Athlon, Duron are all 64 bit already! Have been since the original Pentium came out. Additional address pins are needed only for as much additional physical memory is supported - 4 more pins would allow 16 times the physical memory of present chips. Internal data paths in the ALU will be wider - that's what adds 5% to the die size

Translation: Most of the new features of 64-bit processors are just marketing bullets.

Scumbria



To: Dan3 who wrote (104841)6/24/2000 4:46:00 PM
From: Paul Engel  Read Replies (1) | Respond to of 186894
 
ALibiDan - re: "Surprise! External Data and cache paths for Pentium, Pentium II, Pentium III, Cyrix, K6, K6-2, Celeron"

Thanks for the TOTALLY CLUELESS RESPONSE !!

Internally, all the data and address lines are 32 bits wide - and that covers 90% of the chips surface.

Doubling the size to 64 lines wide will have a major impact on die size.

Paul


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