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memory interface

binsky3333

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Hi,
Which is better a 512bit bus or a 256bit bus.
 

hat

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Depends on the card in question. A 512 bit 2900XT is generally slower than the 257-bit 8800GTS. But yeah 512bit on identical cards would be faster.
 
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256bit to 512bit doubles the bandwidth, so for 256bit to keep up with 512bit it would have to be clocked twice as fast.
 

Nyte

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It's dependent on your memory controller as well. A 512-bit memory bus width only gives you the POTENTIAL to get double the bandwidth of a similar card with 256-bit memory bus width.
 

Kursah

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Nyte is right, also the GPU's ability to use a 512 bit bus is arguable..even a 320-bit bus is arguable...considering both the 8800gt's and 3870's use 256-bit busses and are faster than their higher-bit-memory-bus fore-graphics-adapters...go for overall performance and needs for your goals, not just memory bus bandwidth, as you may get less than you hoped..even if marginally..some are very picky.

:toast:
 

Duekay

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I heard something about a 256 being faster if it has DDR3 memory rather than a 512 with DDR2.
 

jbunch07

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memory bus inst everything, depends on ram and clocks, 512 is better than 256 if both cards are identical though
 
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