Click For Larger View. The Radeon HD 5870 Eyefinity 6 Edition sports a GPU clock of 850MHz with a memory clock speed of 1.2 GHz (4.8Gbps effective)--that equates to roughly 153.6GB/sec of peak ...

ATI Radeon HD 5870 Eyefinity 6 Review Manufacturer: ATI UK Price (as reviewed): £428.32 (inc VAT) US Price (as reviewed): $499.99 (ex tax) Trawl a few forums for advice on which high-end graphics ...

At the top end of the GPU, AMD's beefed-up the tessellation engine again; it was reworked from Radeon HD 5-series to Radeon HD 6-series, too.

With the HD 5870 Eyefinity 6 Edition, all the outputs are via DisplayPort, and of the mini variety so that it can fit all those sockets on the rather crowded backplate.

ATI Radeon HD 2000 Series. The Radeon HD 2900 XT has a dual-slot design with a cooler that pulls air from within the case and exhausts it out the back of the card.

The Radeon HD 6850 was dramatically faster than the 5770 despite costing only about $30 more; the Radeon HD 6870, meanwhile, managed to run a few frames per second faster than the more expensive 5850.

We pitted the Radeon HD 7970 ($550) against AMD’s previous single GPU champ, the Radeon HD 6970 ($250), and an EVGA GeForce GTX 580 Classified ($590), a 3GB variant of the GeForce GTDX 580.

By most definitions, AMD’s Radeon HD 6900 graphics cards are powerful, but for those who are looking to push huge resolutions, a little more oomph might be desired. That’s where multi-GPU ...

Radeon HD 5450 CrossfireX (dual GPUs) A second card requires you to add another 25 Watts. You need a 350+ Watt power supply unit if you use it in a high-end system.

AMD HD 7990 – 615W. Nvidia GTX 690 – 528W. Nvidia GTX Titan – 450W. 2x AMD HD 7970 GHz – 700W. DirectX 11 tessellation performance . Heaven 4.0 – FPS: higher is better . AMD HD 7990 ...

The Radeon HD 7990 - codenamed Malta - achieves its colossal performance levels by combining two top-end "Tahiti" graphics chips onto one board, running them at speeds exceeding 1GHz, ...