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hanxm

glTexImage3DEXT problem,sos

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You mean that you made a 3D texture and it consumes for RAM?
On Windows, the driver needs to keep a backup copy of the texture in RAM because of the way Windows works. Windows might suddenly decide to overwrite some of your stuff in VRAM and it tells the driver "I needed this", the driver later on will reupload the texture.

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Thanks for ur answer. In my project, I need load a large data into texture and in the same time the same size of Ram is consumed. Can I save on this RAM? And how?

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No, current GL doesn't mention anything about how the driver should do it's memory management. For GL 3.0, they wanted to add this feature but I'm guessing GL 3.0 won't see the light of day anytime soon. Your only choice is to add more RAM or move to 64 bit computing and add A WHOLE LOT of RAM.

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