Only for BC titles is it running so low. That's because it's leveraging the older GCN instruction set. Leveraging a newer XSX enchanted title, you're likely looking at 190W+128W? I was thinking about buying one to heat my house this winter, but if true I must buy at least two...
If usable yields are so good, and there was so much thermal and architecture headroom to scaleup frequency, why didn't they go up to 11... ehm... I mean 15TF?