The Radeon HD 4870 X2 (~US$500), a graphics card code-named R700, features two (2) RV770 GPUs. The RV770 GPU is used by the Radeon HD 4870 and 4850.
Features:
- 800 x 2 Stream Processors
- 40 x 2 Texture Units
- 16 x 2 ROPs
- 750MHz Core Clock
- 900MHz (3600MHz data rate) GDDR5 Memory Clock
- 256-bit x 2 Memory Bus Width
- 1GB x 2 Frame Buffer
- 956M x 2 Transistor Count
- TSMC 55nm Manufacturing Process
AnandTech and ExtremeTech both had a hands-on preview of the Radeon HD 4870 X2.
"... We can say that, for those who want to game at the extremely high end, 4870 X2 with it's 2GB of on board RAM will be a more consistent solution than 2x 512MB 4870 cards in CrossFire , as evidenced by our Race Driver GRID test. ... The 4870 X2 will be AMD's proving ground. This preview shows what might be, what could be ... but we must wait for final hardware and final drivers before we can honestly evaluate the card for what it is. Let us hope AMD knows how important having pervasive compatibility really is for this launch. " [AnandTech | ATI Radeon HD 4870 X2 - R700 Preview: AMD's Fastest Single Card]
"Our early look at the performance of the Radeon HD 4870 X2 (code-named R700) is at once exciting and disappointing. ... our early tests only reassure us that there's good reason the R700 card isn't out yet. ATI simply has more work to do. Naturally a high-end dual-GPU card like this will scale better at the highest resolutions and with the highest AA settings, but there's little reason for it not to scale at all, or scale very poorly, at medium-grade resolution like 1680x1050 or 1440x900. ... On the other hand, some tests do indeed show tremendous scaling and overall performance at all settings. " [ExtremeTech | Radeon HD 4870 X2 Performance Preview]
It would be quite exciting to see how the Radeon HD 4870 X2 "final product" will perform. I'm sure AMD/ATI is working diligently to make the R700 fly to the production phase.
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