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Politics : Formerly About Advanced Micro Devices
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To: Scumbria who wrote (48853)2/7/1999 5:09:00 AM
From: Tenchusatsu  Read Replies (1) of 1571943
 
<From an manufacturing point of view, the K7 solution is much better than a high MHz bus. It also provides higher bandwidth than the 600 MHz DRDRAM bus used by Intel.>

I think we're all getting processor buses screwed up with memory buses. The way I see it, there are groups of four SDRAM modules running in parallel at 83 MHz. This is to feed the 64-bit processor bus which runs at 333 MHz.

But having four SDRAM modules running in parallel is expensive because of the huge 256-bit data pipe between the memory and the chipset. Intel's 600 or 800 MHz RDRAM bus is a cheaper solution, not from a cost-per-megabyte standpoint, but from a platform perspective. The reason why this particular EV6 platform will use groups of four SDRAM modules is because servers need huge amounts of memory, which calls for many SDRAM modules anyway. The server platform is complicated already, so going for the huge 256-bit data pipe is no big deal. But for desktops, it's more important to keep the platform low-cost, unless you want to see Camino boards being sold at prices above $400. Higher cost-per-megabyte doesn't matter much because desktops typically use much less memory than servers.

So where does the K7 platform fit into all of this? You tell me. Seems like it will be flexible enough for both servers and desktops, at least in theory. But then again, so is the P6 platform, both in theory and in practice.

Tenchusatsu
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