I haven't seen one. And even if such a program existed, its usefulness would
be questionable at best. Real-world performance depends on the memory
controller design. For example, a 4x32-bit "crossbar" interface is faster
than an 1x128-bit interface in most games, even though the theoretical
transfer rates are identical. Other significant factors include memory
timings, color/Z-buffer compression, and hidden-surface removal (think
Geforce 8800's Early-Z or Radeon's Hyper-Z).

On the other hand, if all you need to do is confirm, for example, your card
has a full 128-bit memory interface rather than a cut-down 64-bit "LE"
interface, then a program like Everest will tell you.

--
"War is the continuation of politics by other means.
It can therefore be said that politics is war without
bloodshed while war is politics with bloodshed."

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oups.com...
Is there a benchmark program that can test my video cards memory
transfer rate?