I don't get why there's such a big power difference.

[FlamingWeazel]

Xenostar said:
The power difference is exactly what you would expect on PC between a 7770 and a 7870 there is no magic that will close that gap.

Even the Tomb raider frame rates are directly comparable between the PC version running on those graphics cards.

The gap is actually bigger in tomb raider, x1 at times drops to 900p, has lower resolution effects, worse AF, etc.....and still has lower fps.