Right, the question is how much is the underclock. For the record I've never believed the "leaked" clock speed specs as they never made sense. I think either A) They were old and outdated by the time they were leaked to the public or B) That Sony intentionally planted them to mislead folks assuming that they would be leaked (similar to what MLID says AMD did for RDNA 4). Either way, the idea of releasing a Pro console with 0% clock speed increase (not counting a optional 10% boost) seemed pretty far fetched.
IF the PC Navi48 card is able to hit 2.9Ghz-3.2Ghz, I would think that the Pro should end up in the 2.4Ghz -2.6 Ghz range (assuming the same 4nm manufacturing process and a 10-20% downclock). With 60CUs that would put the Pro in the 36.5 - 40TFLOP range. For reference, the 7800XT is 37TFLOPS and the 7900GRE is 46TFLOPs. BUT DON"T GET CAUGHT UP IN THE TFLOP numbers though as there is much more to the performance and in real world scenarios, the 7900GRE is only 10-15% faster than a 7800XT in most cases.
More importantly, that level of raster performance should actually be ~2x the base PS5 (actual game performance) and on par with a 6900XT/4070Super (which was always the target from the earliest leaks years ago). I know it seems optimistic on the surface but again unless something is really wrong with the clocks or the manufacturing process is still unchanged from the base PS5 (unlikely), this is actually pretty reasonable if not a bit conservative given the investment in the superior cooling solution in the base PS5.