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pango99

the speed of AGP bus reading data

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my program need to read data from display card,I use "glReadPixels()" to do it,but I found it only read 2M-3M bytes per second,the speed is too slow than my expectation,so how fast does AGP Bus read data?my test is correct?

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it is slow to read from the video memory, it is optimized to go in the other direction.

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In the other direction, writing, it is theoratically calculated to be at 1.06GB/s; probably more though since my last update.

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