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Report: Sapphire's Radeon HD 7790 Dual-X Tested

SweClockers has put the upcoming Sapphire Radeon HD 7790 Dual-X graphics card through its paces in their test lab. Based on the preliminary results, it seems clear that the card and its Bonaire GPU will deliver some very impressive performance and provide Nvidia with some solid competition.

The HD 7790 Dual-X is part of Sapphire's line of premium range of AMD graphics cards and features the company's trademark PCB and cooler design that includes a 21.5 cm PCB and aluminum fin-stack heatsink with two 80 mm cooling fans. The card features a single 6-pin PCIe power connector which indicates a maximum draw of 150 W and has two DVI connectors and a single HDMI and DisplayPort output.

SpecificationRadeon HD 7790Radeon HD 7770 GHz Edition
ModelSapphire Dual-X OCReference GHz Edition
GPUBonaireCape Verde XT
ArchitectureGCN 28 nmGCN 28 nm
GPU Frequency1,075 MHz (OC)1,000 MHz
Stream Processors728 pcs640 pcs
Memory Bus128-bit128-bit
Memory1 GB GDDR51 GB GDDR5
Memory Frequency6.4 GHz (OC)4.5 GHz
Memory Bandwidth102.4 GB/s72 GB/s
Fill Rate (pixels)17.2 GPix/s16 GPix/s
Fill Rate (texel)51.6 GTex/s40 GTex/s

SweClockers have so far benchmarked the graphics card in 3DMark 11 and the "Fire Strike" test at 1920 x 1080 using the beta 12.101.2.0 Catalyst drivers. They found that Sapphire's HD 7790 provides comparable performance to AMD's reference HD 7850. In 3DMark 11, the HD 7790 was just 8.7 percent slower than the HD 7850 and 8.3 percent slower in the Fire Strike Test.


The HD 7790 is expected to be released by late March or the middle of April. The Sapphire HD 7790 Dual-X has been reportedly priced at 1200 Kronor excluding VAT ($189).