Video memory: get a card with at least 2GB of memory. NVidia's OpenCL implementation is 32 bits only and therefore PTGui can only access 2GB of memory on NVidia cards. The same currently goes for AMD cards. However, AMD already offers an experimental 64 bits mode which PTGui may use in a future version so that all memory can be accessed. Stitching with more than 2 GB video memory will only be marginally faster though.
Из описания панорамосшивалки моей.
О чем они? Что за 64 битна адресация у амд?