Far Cry 2

The Radeon HD 5770 is somewhat slower than the Radeon HD 4890 throughout the test and cannot maintain a comfortable bottom speed at 1920x1200. Still, this is an excellent result considering the new product’s price whereas more demanding gamers can buy an RV870 Cypress based solution. Overclocking helps boost the new card’s bottom speed up to comfortable level at 1920x1200.

The Radeon HD 5750 is not far behind the senior model despite the substantial difference in clock rates and one disabled SIMD core. Graphics memory bandwidth seems to be the limiting factor for both solutions. The Radeon HD 5750 can be used to play at 1680x1050 at maximum graphics quality settings and with turned-on full-screen antialiasing. When overclocked, it delivers the same performance as the senior model of the series.

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.

At the two lower resolutions the Radeon HD 5770 delivers the same performance as the GeForce GTX 275. Starting from 1920x1200, its 128-bit memory bus affects the results. Every resolution is playable, though. The same goes for the Radeon HD 5750 which looks much better than the Radeon HD 4770, just as you can expect by comparing their specs. Overclocking produces the same effect as in the previous game. Note only that the limiting effect of the 128-bit memory bus cannot be made up for by ordinary overclocking at 2560x1600.

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 improved architecture helps the Radeon HD 5770 beat the Radeon HD 4890 at every resolution save for 2560x1600. It is also better than the GeForce GTX 275 everywhere, including 2560x1600. The Radeon HD 5750 is farther behind the senior model here than in the previous games because S.T.A.L.K.E.R.: Clear Sky makes use of complex special effects and a resource-consuming rendering technique that depends on the GPU frequency. This is indicated by the results of the overclocked cards: the Radeon HD 5770 overclocked to a GPU frequency of 940MHz leaves behind both the Radeon HD 4890 and GeForce GTX 275. The junior model of the series is almost as fast as the Radeon HD 4890 when overclocked.

Even at the relaxed settings the Radeon HD 5770 is limited to 1680x1050 whereas the Radeon HD 5750 can only deliver a comfortable frame rate at 1280x1024.