Rambus (RMBS) - Eagle or Penguin Message Board

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Technology Stocks : Rambus (RMBS) - Eagle or Penguin

RMBS 92.35

-0.4%

Nov 25 3:59 PM EST

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To: sylvester80 who wrote (54835)	9/23/2000 11:45:56 AM
From: mishedlo	Read Replies (2) of 93625

Is DDR too slow? This post from from Ace's technical message board makes some great points. The DDR main memory solution is not to market yet, and video DDR is already set to become a bottleneck. ----------------------------------------------- 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

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