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To: Tenchusatsu who wrote (98433)2/7/2000 6:09:00 PM
From: Jeff Fox  Read Replies (1) | Respond to of 186894
 
Tench, re: AMD's "superior" EV6 point-to-point bus

I love this oxymoron...

Single processor "bus"

Sort of like an airliner with room for one only passenger, huh?

Jeff



To: Tenchusatsu who wrote (98433)2/7/2000 8:38:00 PM
From: Paul Engel  Read Replies (1) | Respond to of 186894
 
Ten - Re: " The Merced bus indeed runs at 266 MT/sec (millions of transfers). It's actually a 133 MHz bus, but the 64-bit data bus is double-pumped. And yes, up to four processors share a single bus. (I love bringing that up, since it flies in the face of AMD's claims to a "superior EV6 point-to-point bus.") Finally, the bus supports an "enhanced defer" feature which helps to lower the latency relative to the P6 bus.
- Starting speed is indeed 800 MHz. The cat's finally out of the bag.
- The Merced bus can actually address up to 16 terabytes of data (44-bit address bus). However, Intel's own 460GX chipset will "only" (heh heh) be able to handle 64 gigabytes of memory (i.e. 36-bit address bus).

Excellent input !

I guess we must sit back and wait for some benchmarks to appear after the first production shipments go out.

How much of a "limitation" is the 64 GigaByte address space?

Paul