Review of the Gigabyte and Sapphire AMD Radeon HD 7790 Video Card. AMD just introduced the Radeon HD 7790 desktop graphics card that is powered by the new Bonaire GPU. This card uses the latest GCN Graphics Core Next architecture from AMD along with 896 Stream processor units to bring better performance to gamers at the 149 USD price point. Read on to see how cards from Gigabyte and Sapphire do when put to the test.
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