What's the meaning of crossfire technologies

  • Thread starter Thread starter DDC
  • Start date Start date
DDC said:
At that web site there is some line that speak about the cross fire
technologies and it say something about 12 processor pixel shaderand a
peak fill rate of 2.36gb/s. Does it mean that i should multypli the 12
by the 2.36Gb/s and by that getting 28 Gb/s of pixel fill rate.
Click to expand...

No. You are confusing ATI's "crossfire" approach to using multiple GPUs
with the number of pixel shaders in a single GPU. The 1600XT has twelve
pixel shaders and a peak fill rate of 2.36GB/s. It can be used in
conjunction with another 1600XT in a "crossfire" configuration on a
crossfire motherboard. Crossfire allows each card's gpu to render alternate
frames (and supports other ways of two cards sharing the load - scissoring
and tiling) thereby speeding up the frame rate. However, even two cards are
not going to be able to exceed their combined max fill rate and with the
overheads involved in processing in a two-card set up their combined fill
rate is likely to be substantially less than the theoretical max of 4.72GB/s
 
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