A:Answer 7920HQ is actually a i7-7920HQ i7 MOBILE processor and the 7920X is an i9-7920X DESKTOP processor, which is part of X-Series Intel Core processors. Though expensive, it is impressive with 12 cores, 24 threads and up to 4.30 GHz, compared to the i7-7920HQ's 4 cores, 8 threads and up to 4.10 GHz.