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The software stopped working

It could happen that the GPU process crashed and it is still hanging, even after you close the program down. After all we are dealing with thousands of parallel operations. The best advice would be - restart the computer - it should clean all hanging processes and pipes.

Why it needs modern graphic card?

The actual calculations are done by your GPU (graphical card) not CPU (processor) because of the parallelism needed for fast calculations - GPU have much more cores that can run calculations all at the same time. Your processor has probably 4 to 8 cores, but even lower end GPU’s have 700-1000 cores and the newest gaming video cards like RTX-3080 Ti have now 10,000 cores. That is an enormous difference and it is truly like having a supercomputer at your disposal. Running the calculations on the CPU alone would not be realistic.
The software needs relatively modern GPU. Please try it before purchasing.

The output is black or just noise

It means the vulcan library can’t correctly work with your GPU driver. It looks like it is working, but the output is garbled. Try to update your video card drivers. Try using CPU mode (it will be very slow)

CPU Mode

CPU Only mode is a fallback when nothing else works. It will use only your CPU cores - so instead of 1000 of GPU cores, you will be running it with only a few CPU cores. It will be about 10-20x slower than with GPU.
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