I just ran the benchmark of the previous Tomb Raider installment, Rise of the Tomb Raider, and it was both a bit more demanding overall of power (it stayed closer to the peak than Metro Last Light Redux did), and with a higher peak, that being 276.3 watts. I can't max out all the settings while maintaining constant 60/near 60 fps, but simply lowering VXAO to HBAO+ made enough of a difference for me. 67 fps in the benchmark.
So this is interesting. nVidia's FE is an extremely efficient piece of kit, and it appears to max out the potential of its GPU using its power profile, when tweaked, but it does come very close to bumping into the limitations of its power connectors/set limits.
If you add another fan, that uses more power; if you beef up the power phases, and connectors, you can use more power, but you also eat more power. So the question remains as to what is the sweet spot of this GPU regarding voltages, and the power available to it. Where's the line of diminishing returns set, and to what degree does the silicon lottery determine if a given chip will get much/any benefit from more power and voltage?
I have the two most recent Hitman games that I can benchmark, and check the power consumption of, if anyone is very interested. But I already have the sense that they won't be more demanding than Rise of the Tomb Raider, as I've previously checked to see how many watts my whole system used, while monitoring using the software of my CyberPower UPS.
In conclusion, I'm guessing that there's maybe another two to five percent of performance available over the FE cards by using a beefy AIB partner's card that has a BIOS that's been updated to exceed the limits nVidia initially imposed/suggested. But that will depend on the silicon lottery, and that raises the question of whether or not any binning is going on, beyond what nVidia has suggested it's already doing with its distinction between what it provides for chips going into boards marked as "overclocked", vs. those that aren't.
If an AIB partner card is using the limits nVidia suggested/imposed, then it might be hitting a wall regardless of its beefed up power delivery, and regardless of its cooling.