Is GPU-Z displaying my memory usage correctly?

[cadaveca]

Both sets of ram are active..just they get the exact same data one them - it's not used as one large continuous 2 GB framebuffer.

 

[Black Panther]

Both sets of ram are active..just they get the exact same data one them - it's not used as one large continuous 2 GB framebuffer.

Hmm, could it be then that my game is using 870MB from vram, and since you say it's also mirrored on the other set, then system monitor and gpu-z are counting them hence saying that I'm using 1.74GB of memory in-game?

 

[cadaveca]

Nah. Becuase of how crossfire works, each GPU needs access to the same data, so the data is mirrored exactly. The only part that isn't mirrored is the one area that the rendered frames are output to to be sent to the main GPU. This area might be 128MB, but definitely not ~700MB.

Also, as i mentioned on the last page, my 2 GB cards and 1GB cards also seem about ~700MB too high. I have a couple ideas of what this might be, but lack the proper understanding to figure out which is which. Hardware..yeah, makes sense to me..software...not so much.

 

[turbine]

Hmm, could it be then that my game is using 870MB from vram, and since you say it's also mirrored on the other set, then system monitor and gpu-z are counting them hence saying that I'm using 1.74GB of memory in-game?

This is what I was thinking. But it wouldn't explain why it happens with single-GPU cards.

 

[Black Panther]

This is what I was thinking. But it wouldn't explain why it happens with single-GPU cards.

It does? On which single-GPU card does this happen?

 

[cadaveca]

It does? On which single-GPU card does this happen?

Basically all ATI cards.