W temacie PTGui i kart graficznych, ze strony producenta oprogramowania:

PTGui 10 features a completely rebuilt, blazing fast stitching engine with GPU acceleration! (...) For GPU processing the stitcher uses OpenCL, a technology supported by both major GPU vendors (NVIDIA and AMD) and supported on Windows and Mac. (...) So how much speedup should you expect compared with PTGui 9? (...) Initial tests suggest a speedup anywhere between 1.5x and 10x depending on hardware and on the kind of panorama. (...) To use the GPU for stitching a video card supporting OpenCL 1.1 is required. (...) PTGui needs at least 512MB of video memory, but 2 GB is recommended: although the panorama doesn't need to fit entirely in the video RAM, moving data between the CPU and the GPU is relatively slow and should be avoided to get the best performance. (...) Finally it's worth noting that with this improvement in stitching speed, disk speed is more and more becoming the limiting factor. Replacing a spinning hard disk with an SSD will make even more difference than before. (...) NVIDIA's OpenCL implementation is 32 bits only and therefore PTGui can only access 2GB of memory on NVIDIA cards. (...) A basic guideline would be to get a recent NVIDIA or AMD card with 2 GB of GDDR5 memory and as many CUDA Cores or Stream Processors as your budget allows. Note that other components of the computer are just as important: in particular be sure to have enough RAM installed (16 GB or 32 GB for larger panoramas), and use SSD drives instead of spinning hard disks for temporary storage, input and output images.

Więcej informacji:
What's new in PTGui 10? - PTGui
Support / FAQ - PTGui