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Bigbruin.com posted a review on the Sapphire Vapor-X Radeon HD4890 1GB Graphics Card



Never satisfied with just releasing a typical product, Sapphire now offers a variety of Radeon HD4890 cards, including the factory overclocked Vapor-X Radeon HD4890 1GB unit provided for this review. This card gives the reference design RV790 GPU a slight speed boost from 850MHz to 870MHz, while also giving the GDDR5 memory a bump from 975MHz to 1050MHz.
Sapphire Vapor-X Radeon HD4890 1GB Graphics Card Review