Benchmark Results: Left 4 Dead
2560x1600 is probably the only resolution that matters when testing $1,000+ graphics solutions, and that’s where two HD 4870 X2 graphics cards in CrossFireX take over. We once again see what appears to be a CPU performance cap in a four-GPU solution, but this time it’s the two GTX 295 units taking the hit.
The GTX 280 3-way SLI configuration adds the 2560x1600 resolution to its overall performance lead, once AA and AF are enabled in Left 4 Dead. The GTX 295 Quad-SLI performance cap is alleviated at the highest setting, simply because its GPU load finally exceeds system load.