Haha, never mind then. :P
I'm actually surprised to see that it's still faster - I would have figured the 7770 would have won.
The 7770 is actually really gimped for its model number
Looking at raw shader counts, 7970 = 2048k, 7950 = 1792k, 7870XT = 1536, 7870 = 1280k, 7850 = 1024k, 7770 = 640, 7750 = 512
Every GCN card increases its shader count by 256 except the 7770 which only gets 128 more than 7750. IMO the 7770 should have had 768 shaders like this card http://www.tomshardware.com/reviews/768-shader-pitcairn-review,3196.html
and either a mem bus of 128-256 (192 if they wanted)