Mixtral 8x7b runs well (i.e., produces the correct output faster than I can read it) on a modern AMD or Intel laptop without any use of a GPU - provided that you have enough RAM and CPU cores. 32 GB of RAM and 16 hyperthreads are enough with 4-bit quantization if you don't ask too much in terms of context.

P.S. Dell Inspiron 7415 upgraded to 64 GB of RAM here.