Sapphire doubles memory for hot-clocked Radeon HD 7790

Just a few weeks after the release of AMD's Radeon HD 7790 graphics card, Sapphire has rolled out a second hot-clocked edition. The existing "OC" model combines a 1075MHz GPU speed with 1GB of GDDR5 memory running at 6.4GT/s—modest improvements over the reference config's 1GHz GPU clock and 6GT/s memory. For an encore, Sapphire has whipped up a 2GB OC edition that doubles the onboard memory. This new model has the same memory speed as its 1GB counterpart, but the GPU runs 25MHz slower, at 1050MHz.

The 2GB card also has an updated cooler; the heatsink is connected to a metal plate covering the memory chips on ...