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To: Scumbria who wrote (80414)5/4/1999 2:19:00 PM
From: Tenchusatsu  Respond to of 186894
 
<The cache line size of CPUs being only 32 bytes, what benefit is there for connecting them to high bandwidth dram? Bursts in and out of the CPU are of extremely short duration for the vast majority of applications. Latency is far more important than bandwidth on the desktop.>

Cacheline sizes can change (though probably not for Camino).

Also, one of the benefits of RDRAM is that it's better suited toward handling concurrent traffic from multiple sources, such as processor, AGP, and PCI. Even Bert McComas, an "anti-Rambus" guy, agrees with this.

As for latency vs. bandwidth, one solution to the latency problem is to integrate the memory controller onto the CPU die. Compaq/Digital will do exactly this when they put four RDRAM channels onto the die of the upcoming Alpha 21364. You may be seeing other companies integrating memory controllers as well. And I guarantee you that you won't be seeing DDR SDRAM controllers being integrated onto the die. The low pin count of RDRAM makes it perfect for such integration.

Got any other solutions to the latency problem? The whole computing industry is open to suggestions.

Tenchusatsu