AMD's Radeon HD 4870 X2 - Testing the Multi-GPU Watersby Anand Lal Shimpi & Derek Wilson on August 12, 2008 12:00 AM EST
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Race Driver GRID Performance Scaling
Memory is king in the game at 2560x1600. Our 1GB cards handle the stress the best, and lower framebuffer sizes mean worse performance (especially during loading screens which ran incredibly slow). Our 512MB 4870 cards tanked in CrossFire at 2560x1600, while the 1GB per GPU 4870 X2 delivered wonderful performance. At all other resolutions, the single 4870 performed really well, but we will be interested in seeing if the 1GB version bumps performance up another notch here.
This game, like Age of Conan, runs incredibly well on AMD hardware. Both CrossFire and SLI scale very well, with 4-way CrossFire once again delivering a flat line of performance across all resolutions.