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To: fyodor_ who wrote (75074)3/20/2002 6:10:13 PM
From: Joe NYCRead Replies (1) | Respond to of 275872
 
Fyo,

I'm pretty sure Intel switched to the P4 4x100MHz bus for McKinley (possibly 4x133).

But isn't it 128 bit rather than 64 bit?

Joe



To: fyodor_ who wrote (75074)3/20/2002 6:33:17 PM
From: Joe NYCRespond to of 275872
 
Fyo,

Tenchusatsu PMed me with this:

McKinley bus is similar to the Pentium 4 bus, but not exactly alike. While the P4 bus is 100/133 MHz quad-pumped, McKinley bus is 200 MHz double-pumped. Data transfer rate is the same, but McKinley bus can issue requests faster and achieve higher utilization rates.
Oh yeah, and McKinley bus is 128 bits wide, unlike the 64-bit wide P4 bus. By all measures, the McKinley bus is much better than the P4 bus, but also more expensive to implement.

Joe


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