Several Alienware m15 R5 laptops are apparently reporting just 4,608 CUDA cores for the RTX 3070 Laptop GPU instead of 5,120. Apart from the CUDA cores, even the clocks, TMUs, and pixel fillrates are being reported to be lower than normal leading to performance loss. Currently, a possible workaround is to flash the VBIOS from an m15 R4 that seems to restore the correct values and performance.
SOURCE: Notebookcheck