Half-Life 2: Lost Coast
Half-Life 2: Lost Coast (Direct X)
Lost Coast is the free technology demo that Valve created to show off their HDR rendering technique. Because this method of doing HDR (high dynamnic range) lighting uses integer math instead of floating point, both ATI and NVIDIA cards can do both HDR and AA at the same time.
Valve’s HL2: Lost Coast engine is the same that is used in Day of Defeat: Source and Half-Life 2: Episode 1, so results here reflect on those titles as well. Unfortunately, it falls under the “D3D limitation” banner and as such direct performance comparisons from a single 7950 GX2 to Quad SLI aren’t possible and we’ll look at Lost Coast running NVIDIA’s 8xSLIAA.
In this case, the Quad SLI configuration matches exactly the performance levels of the single 7950 GX2, while pumping out better image quality at the same time. Playing at 2560×1600 is a bit of a stretch with these settings as frame rates dip below the 20 mark every once in a while and that can really drag down the gaming experience. Compared to the 7900 GTX SLI configuration, also running 8xSLIAA, the Quad SLI configuration is able to get a 29% performance lead.