AtenRa
Lifer
- Feb 2, 2009
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Your charts are outdated; e.g., the July TPU 7770 review used Cat 12.3 drivers, NOT 12.7beta which was the driver that gave more performance.
Nevertheless, I apparently misremembered... actual differential is more like 27%:
Let's take one of the TPU reviews using Cat 12.7beta drivers: http://www.techpowerup.com/reviews/Zotac/GeForce_GTX_660/27.html
Unfortunately there isn't a 5770 on the chart, but there is a 6670. 57/30 = 1.9x the speed of 6670
Now look at: http://www.techpowerup.com/reviews/NVIDIA/GeForce_GTX_670/28.html showing the 5770 to be 36/24 = 1.5x the speed of 6670
1.9/1.5 = 27% faster
However, in newer games the 7770 should be better able to drive fps and frametimes, particularly in tessellated games, so in those games the delta is probably more than 27%, like 30-40% faster.
I dont see any significant performance increases from Cat 12.3 to Cat 12.7
Cat 12.3 review
http://www.techpowerup.com/reviews/Sapphire/HD_7770_Vapor-X/8.html
Cat 12.7 review
http://www.techpowerup.com/reviews/MSI/GTX_650_Power_Edition/7.html
Lets see Batman AC, BF3, Civ V and Crysis 2 at 1920x1200 from the above reviews.
Batman AC Cat 12.3 = 33,5fps
Batman AC Cat 12.7 = 33,7fps
BF3 Cat 12.3 = 26fps
BF3 Cat 12.7 = 26,1fps
Civ V Cat 12.3 = 37fps
Civ V Cat 12.3 = 35,2fps (Lower than cat 12.3)
Crysis 2 Cat 12.3 = 25,6fps
Crysis 2 Cat 12.3 = 25,6fps
So even with Cat 12.7 the performance difference should stay the same as before, there is no way that HD7770 is 40% faster than HD5770/6770.