Soldato
I don't know about DM, but an OC'd 7970 smokes an OC'd 580 by 49% in Skyrim, 72% in Deus Ex(but it's an AMD title), 48% in BF3(but it would be less with 4XAA instead of 2XAA)@2560
The Skyrim result imo is quite impressive, considering Nvidia has very good performance in this title.
Not impressed with[H] for not doing 4XAA in BF3 though.
http://www.hardocp.com/article/2012/01/09/amd_radeon_hd_7970_overclocking_performance_review/5
Regarding an OC' 7970 v a stock 6970 in BAA:
'The stock GIGABYTE Radeon HD 7970 had an average 19.6 FPS more than the AMD Radeon HD 6970, while the overclocked version was 117% faster with 28.7 higher average framerates.'
http://hardocp.com/article/2012/02/08/gigabyte_radeon_hd_7970_oc_video_card_review/4
That is a stunning improvement over a previous gens performance imo.
Yep, the overclocking on these 79XX is sweet! Got my 7970 running at 1200Mhz core and broke the 10,000 score mark on 3D Mark 11. Pretty good for a single card.