It could display 80W in GPU-z but I am wondering what his VDDC is. If he somehow got some high 99% ASIC quality GPU where he can run it at 1236Mhz core while undervolted to the min like 0.80V and has some good quality memory which doesn't give memory errors at 2180Mhz.

I had issues running some GPUs at a small undervolt if they were over 1150Mhz, and 1236Mhz would be very difficult to get very stable to the point where you don't need to restart it daily.

He could of just used uber straps or that tool called Pimp my straps to get those speeds.