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To: Dan3 who wrote (112725)10/7/2000 3:15:21 PM
From: Tenchusatsu  Read Replies (1) | Respond to of 186894
 
Dan, <Until the 820 came out, there hadn't been a data bus narrower than 64 bits since the 486.>

I think you might confuse a few people here. The 820 chipset still has a 64-bit FSB.

Maybe you meant memory channel, where the 820 chipset uses a 16-bit wide RDRAM channel.

Tenchusatsu



To: Dan3 who wrote (112725)10/7/2000 3:25:56 PM
From: Paul Engel  Read Replies (1) | Respond to of 186894
 
Lewinsky-Dan - Re: "Every chip in the industry has used a 64 bit data bus since the Pentium 60 came out. All follow on pentiums, K6, Cyrix, Winchip, all of them. Until the 820 came out, there hadn't been a data bus narrower than 64 bits since the 486."

This is not correct!

The Pentium - and its derivatives & copies - have a 32 bit data bus but use an external 64 bit bus to SPEED UP the data rate by feeding it 2 32 bit words at a time.

This is necessary because the processor runs internally FASTER than most standard memory access times.

If you feed a 64 bit processor with only 64 bits of data - even at DDR rates of 266 MHz - you will STARVE the processor for memory - greatly limiting performance to that of 32 bit processors.

You want AMD to feed their 64 bit SludgePuppy at the same rate it feeds its 32 bit AthWipey with data?

Paul