The TDP of the 5900HX is 45W.

Don't forget we are comparing last-gen AMD vs current gen M2.

M2 on Mac makes 1884/8717, but on Paralles -> 1681/7260.

So, the penalty is 11% on single, 17% on multi because of running on Windows via Paralles.

APPLE M1 average Single Core is 1706, average multi is 7421 on MAC.

If we apply the above penalty becomes -> 1706/7421 -> 1522/6180.

AMD 5900HX average Single Core is 1413, average multi is 7656.

So, AMD - 1413/7656 | Apple M1 - 1522/6180 -> Amd is 8% slower in single, 19% faster in multi.