A new leak points to the GeForce GTX 1080M having 2048 CUDA cores, which is in contrast with earlier rumors that claimed NVIDIA's new mobile GPUs would have the same amount of CUDA cores as the desktop versions.
The mobile GeForce GTX 1080M has less CUDA cores than the desktop GTX 1080, which has 2560 CUDA cores, but a bit more than the 1920 CUDA cores found on the desktop GTX 1070. If the leak is accurate, the GTX 1080M has 128 TMUs and 64 ROPs. The new data originates from a leak from ChipHell, and also included a Fire Strike benchmark score:
The leaker revealed that GPU clock speeds are 1442 MHz (base) and 1645 MHz (boost). Not a word about memory clock, but we expect something close to 2000 MHz.
The Fire Strike score is quite readable though, we can assume that GTX 1080M gets 16893 GPU points. This would put GTX 1080M to the top of single-GPU notebook performance.