Folding Forum

Local store has some in stock now. Haven't been able to find any folding performance reports on any of them, though.

Arc GPU are not supported by FAH for the moment :
- They lack hardware double precision support
- The software implementation of double precision is not reliable enough yet to run FAH

Ah, OK. Don't know what that means, but good to know.

To explain what that means in practice, folding mostly uses single précision floating point calculations. Those are also called 32-bit or FP32 calculations. A small amount of the calculations need more precision than can be obtained with 32-bits, so double precision 64-bit (FP64) calculations are used where needed.

How this applies to the Intel graphics is that when first supported the iGPUs from their 9th generation supported FP64 in hardware. For whatever reason there was not a designated 10th generation, the 11th generation iGPUs also supported FP64. With the 12th generation GPU architecture Intel removed the FP64 hardware support and added code in the driver to emulate FP64 calculations with software instructions. From early information out on the just released Arc GPUs they are using the same approach to support FP64. Tests done using folding gave inconsistent results, or caused the folding core to crash.

Ah, interesting. Thanks for the explanation.