AMD Radeon HD 7970 GHz Edition Review: Battling For The Performance Crownby Ryan Smith on June 22, 2012 12:01 AM EST
Portal 2 continues the long and proud tradition of Valve’s in-house Source engine. While Source continues to be a DX9 engine, Valve has continued to upgrade it over the years to improve its quality, and combined with their choice of style you’d have a hard time telling it’s over 7 years old at this point. Consequently Portal 2’s performance does get rather high on high-end cards, but we have ways of fixing that…
The great thing about having such powerful cards is that we can push image quality to the max on better performing games, and in no place is that better evident than Portal 2. Here we can get away with 4x Super Sample Anti-Aliasing even at 2560, providing smooth and beautiful gameplay.
Unfortunately for AMD, they just don’t do very well on this test and the 7970GE doesn’t do much to remedy that. Where the GTX 680 can surpass 60fps the 7970GE can only manage 55fps, giving the GTX 680 a commanding 25% lead (or causing the 7970GE to trail by 20%). The 7970GE is more than playable here, but it would be nice to see it pass 60fps to maximize how fluid the game is. The situation of course improves without SSAA, but at these performance levels it doesn’t make a whole lot of sense not to use it at single-monitor resolutions.