Far Cry 2
The new card was unable to outperform the GeForce GTX 295 but was much better than the Radeon HD 4870 X2, especially at 1920x1200 where its bottom speed is higher. Owners of large monitors or GeForce GTX 295 cards should not worry about upgrading, and the GeForce GTX 285 provides a larger reserve of speed, yet AMD’s effort cannot be underestimated: the RV870 is indeed equal to two RV770 chips!
Left 4 Dead
The game runs on the Source engine and has an integrated benchmark, but the latter does not report the bottom speed information.
The Radeon HD 5870 goes ahead of the Radeon HD 4870 X2 starting from the resolution of 1680x1050. The gap is growing larger, reaching an impressive 33% at 2560x1600! The increase in average performance from 80 to 110fps cannot be noticed in practice, yet AMD’s achievement is indisputable.
S.T.A.L.K.E.R.: Clear Sky
To achieve a playable speed in this game we disabled FSAA and such resource-consuming options as Sun rays, Wet surfaces and Volumetric Smoke. We use the Enhanced full dynamic lighting (DX10) mode for our test and additionally enable the DirectX 10.1 mode for the ATI cards.
The new Radeon HD 5870 is not too brilliant in comparison with the GeForce GTX 295, but the gap is small at 2560x1600, the AMD solution even providing a higher bottom speed. That’s an impressive result for a single-chip graphics card.