Half-Life 2 and Chronicles of Riddick
Half-Life 2
The first of the game tests makes use of SLI for both 7800 GTX and 6800 Ultra.
Outside of the theoretical tests in the last two pages, we start to see CPU limitations creep in. A single 7800 GTX is faster in our Half-Life 2 benchmark test than SLI 6800 Ultras, with 7800 GTX in SLI pegged against a CPU limitation. That's a CPU limitation with a 2800MHz Athlon FX, incase you needed reminding. At 1600x1200 with 4AA and 16AF, 6800 Ultra SLI, 7800 GTX and 7800 GTX SLI have monsterous performance. Everything is faster than 60fps on average, at all settings.
Chronicles of Riddick
Riddick's SLI support thankfully seems correct in the 77.62 driver, for both 6800 Ultra SLI and 7800 GTX SLI.
6800 Ultras in SLI best a single 7800 GTX by a fair margin with 7800 GTX SLI standing far and away above the rest. With the lowest framerate for the 1600x1200 4AA 16AF test for 7800 GTX SLI being just under 60fps, Riddick works well with both graphics card and CPU.
A single 7800 GTX is nearly 1.6 times (60%) faster than a single 6800 Ultra at the highest settings with the average performance increase being just over 1.4 times (40% faster). With Riddick's engine being similar to Doom3's (hardware stencil shadows, Z-only pre-pass, shadow volume extrusion done on the CPU), you can imagine Doom3 performance, too.
