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Performance Comparison Between Single Configurations And SLI Setups

VGA Charts VIII: PCI Express Winter 2005
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The games of our benchmark suite reacted very differently to SLI. For example, Age of Empires III, Fable and Serious Sam 2 actually ran slower with the supposed 3D double graphics card hitter. On the other hand, the remaining games benefited from the SLI configuration. Interestingly, Age of Empires III also reacted negatively to the higher clock speed of the ASUS GeForce 7800 GTX Extreme.

In four games, the single GeForce 7800 GTX proved itself superior to the SLI setup of the older GeForce 6800 Ultra. The two were tied for the lead with two other games. The GeForce 6800 Ultra SLI solution only took a slight lead in F.E.A.R. Meanwhile, the GeForce 7800 GTX SLI configuration was the most powerful--and the most expensive--in the group.

Differences: Single Card Vs Dual Card SLI

Age of Empire 3 Single Card SLI (2 cards, parallel) Performance Gain / Loss (%)
Geforce 7800 GTX (256 MB) 220.8 fps 180.4 fps -18.3%
Geforce 6800 Ultra (256 MB) 94.0 fps 83.6 fps -11.1%
Geforce 6800 GT (256 MB) 80.7 fps 73.8 fps -8.6%
Geforce 6600 GT (128 MB) 57.4 fps 55.3 fps -3.7%
Fable - The Lost Chapters Single Card SLI (2 cards, parallel) Performance Gain / Loss (%)
Geforce 7800 GTX (256 MB) 210.9 fps 187.8 fps -11%
Geforce 6800 Ultra (256 MB) 155.1 fps 134.4 fps -13%
Geforce 6800 GT (256 MB) 125.3 fps 117.7 fps -6%
Geforce 6600 GT (128 MB) 76.4 fps 80.7 fps +6%
Quake 4 Single Card SLI (2 cards, parallel) Performance Gain / Loss (%)
Geforce 7800 GTX (256 MB) 438.5 fps 520.7 fps +19%
Geforce 6800 Ultra (256 MB) 307.0 fps 433.3 fps +41%
Geforce 6800 GT (256 MB) 268.9 fps 414.1 fps +54%
Geforce 6600 GT (128 MB) 198.4 fps 304.0 fps +53%
Serious Sam 2 with HDR Single Card SLI (2 cards, parallel) Performance Gain / Loss (%)
Geforce 7800 GTX (256 MB) 194.3 fps 175.7 fps -10%
Geforce 6800 Ultra (256 MB) 130.6 fps 131.0 fps 0%
Geforce 6800 GT (256 MB) 121.2 fps 115.8 fps -4%
Geforce 6600 GT (128 MB) 63.8 fps 54.8 fps -14%
Serious Sam 2 Single Card SLI (2 cards, parallel) Performance Gain / Loss (%)
Geforce 7800 GTX (256 MB) 103.2 fps 99.1 fps -4%
Geforce 6800 Ultra (256 MB) 84.2 fps 79.6 fps -5%
Geforce 6800 GT (256 MB) 79.7 fps 76.9 fps -4%
Geforce 6600 GT (128 MB) 59.8 fps 67.8 fps +13%
Black & White 2 Single Card SLI (2 cards, parallel) Performance Gain / Loss (%)
Geforce 7800 GTX (256 MB) 145.5 fps 210.6 fps +45%
Geforce 6800 Ultra (256 MB) 89.5 fps 148.7 fps +66%
Geforce 6800 GT (256 MB) 79.1 fps 136.6 fps +73%
Geforce 6600 GT (128 MB) 73.3 fps 81.1 fps +11%
F.E.A.R. Single Card SLI (2 cards, parallel) Performance Gain / Loss (%)
Geforce 7800 GTX (256 MB) 270.0 fps 377.0 fps +40%
Geforce 6800 Ultra (256 MB) 206.0 fps 285.0 fps +38%
Geforce 6800 GT (256 MB) 180.0 fps 268.0 fps +49%
Geforce 6600 GT (128 MB) 103.0 fps 152.0 fps +48%
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