Originally posted by: VeZ
Since its only 128 bit, how much will that take off of its capabilities? I wonder if asome company will try to boost it up to 256 bit, if they did then i would sure jump on this card, but right now i dont know what to do, my card right now is 256 bit so going down to 128 bit is weird for me
They do explain it in the reviews, but I'll rehash it.
The reason the 128-bit memory bandwidth is tolerable is because is has extremely fast memory (500 MHz DDR = 1000 MHz effective) on a 128-bit bus.
The Radeon 9800 Pro, for example, has 340MHz DDR memory on a 256-bit bus, which would be the equivalent of 680 MHz DDR (1360 MHz effective) on a 128-bit bus.
There is, therefore, a 36% memory bandwidth difference between the cards - large, but not an insurmountable obstacle because the 6600GT has a better/faster core: a 500 Mhz core that is more efficient than the R9800's core, clock for clock.
A Radeon 9800SE, a 128-bit card from last generation, operates at 325/290 (IIRC). The 290 Mhz memory is on a 128-bit bus so it's only equal to 580 Mhz of effective memory bandwidth, which
is an insurmountable obstacle and cripples the card.
The short and skinny of what I just said: look at both the speed (MHz) and the bits.
However, the point is moot anyways because the 6600GT is PCI-Express only right now, so the 99% of us still on AGP are screwed for the time being

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