BmR takes a look at the performance of the Sapphire Radeon HD 4770 CrossFireX video card
"The Sapphire Radeon HD 4770 introduces the 40nm RV740 GPU paired to 512MB of DDR5 video frame buffer memory, and a double-height cooler allows the 100277L model video card to operate at 750MHz. As of May 2009, the Sapphire HD4770 sells for as low as $99, which allows gamers to create a very affordable CrossFireX array using this mainstream graphics accelerator. Benchmark Reviews compares two Sapphire Radeon HD4770's assembled into a CrossFireX set against a large collection of high-performance GPU's for the tests in this article."
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Sapphire Radeon HD 4770 CrossFireX Performance
