|Radeon HD5830 DirectX-11 Gaming Performance|
|Reviews - Featured Reviews: Video Cards|
|Written by Bruce Normann|
|Friday, 12 March 2010|
Page 5 of 8
S.T.A.L.K.E.R.: Call of Pripyat Benchmark DX11 Results
The events of S.T.A.L.K.E.R.: Call of Pripyat unfolds shortly after the end of S.T.A.L.K.E.R.: Shadow of Chernobyl. Having discovered about the open path to the Zone center, the government decides to hold a large-scale military "Fairway" operation aimed to take the CNPP under control. According to the operation's plan, the first military group is to conduct an air scouting of the territory to map out the detailed layouts of anomalous fields location. Thereafter, making use of the maps, the main military forces are to be dispatched. Despite thorough preparations, the operation fails. Most of the avant-garde helicopters crash. In order to collect information on reasons behind the operation failure, Ukraine's Security Service sends their agent into the Zone center.
S.T.A.L.K.E.R.: CoP is developed on X-Ray game engine v.1.6, and implements several ambient occlusion (AO) techniques including one that AMD has developed. AMD's AO technique is optimized to run on efficiently on Direct3D11 hardware. It has been chosen by a number of games (e.g. BattleForge, HAWX, or the new Aliens vs. Predator) for the distinct effect in it adds to the final rendered images. This AO technique is called HDAO which stands for ‘High Definition Ambient Occlusion' because it picks up occlusions from fine details in normal maps.
S.T.A.L.K.E.R.: Call of Pripyat is very sensitive to MSAA, and has a very steep decline in frame rates when going from zero MSAA to the maximum value of 4X. The other two benchmarks went up to 8x, remember and neither of them suffered anywhere near this 49% decline in fps, as MSAA was increased to the max. In S.T.A.L.K.E.R.: CoP, we also see a reversal from the results of Heaven, as the HD 5830 actually improves its standing as MSAA is increased. My personal names for these two benchmarks are "Heaven and Hell", so it's not surprising that they contradict one another.
Without MSAA, the 5830 bridges 34% of the difference in performance between the HD 5770 and HD 5850, and at 4x MSAA it achieves 39%. Again, not a big difference between the two extremes, but it just goes to show that performance is ultimately dependant on the software in use. Whether it's the game application itself, or the benchmarking instance, or the driver package, there's no getting around and no predicting how the software will influence the test results.
In our next section, we look at DirectX-11 performance in my favorite new game, DiRT 2.