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To: Bilow who wrote (56468)	10/4/2000 7:38:00 AM
From: sylvester80	Read Replies (1) \| Respond to of 93625

DDR out of bandwidth. Nvidia's Memory Bandwidth Problem aceshardware.com The bottom line is: the current Nvidia GeForce-2 GTS can fully utilize up to 20GB/sec of memory bandwidth. The fastest current GeForce-2 you can buy is the ultra. It retails for $500, because it uses 4-4.5ns DDR memory. If you overclock the memory (and you will--that's the only reason you would pay $500 for this card), you can boost the memory to 500MHz (250MhzX DDR) and get 8GB/sec. of peak bandwidth. And the GeForce-2 clocked at 280Mhz will use all of that and still be starved for more. So, how fast would DDR have to be to satisfy the current generation of Nvidia chips, on a 128-bit bus? 20GB/s / 128-bit (16 bytes) = 1,250MHz, DDR. In other words, DDR needs to get FIVE TIMES FASTER than it is right now to match the GeForce-2 GTS. Or, you could do something like this: 128-bit / 16-bit = 8 : 8 x 3.2 = 25.6 GB/s for a 128-bit databus What memory does that? hardwarecentral.com