AnandTech review :
http://www.anandtech.com/video/showdoc.aspx?i=3354

RADEON HD 4870 X2 specifications

* Codename: R700 (2 x RV770);
* Process technology: 55nm;
* 2 GPUs, 956M transistors each;
* Unified architecture with an array of shared processors for stream processing of vertices, pixels and other types of data;
* Hardware support for DirectX 10.1, including Shader Model 4.1, geometry generation and stream output;
* 2 x 256-bit memory bus, 4 x 64-bit controller supporting GDDR3 and GDDR5;
* 750 MHz core clock;
* 2 x 10 SIMD cores, including 2 x 800 scalar ALUs, integer and FP calculations, FP32/FP64 support, according to IEEE 754;
* 2 x 10 larger texture units supporting FP16/FP32;
* 2 x 40 texture addressing units;
* 2 x 160 texture fetch units;
* 2 x 40 bilinear filtering units supporting full-speed FP16 texture filtering and trilinear and anisotropic filtring support for all texture formats;
* Dynamic branching in pixel and vertex shaders;
* 2 x 16 ROPs supporting AA modes with programmable fetch of over 16 samples/pixel, including FP16/FP32 frame buffer. Up to 32 samples/clock (including MSAA 2x/4x modes and FP16 buffer), 128 samples/clock in Z only mode;
* Simultaneous write to up to 8 frame buffers (MRT);
* Support for 4 x RAMDAC, 4 x Dual Link DVI, HDMI, HDTV, DisplayPort (only 2 available);




ATI RADEON HD 4870 X2 2x1024MB

* GPU: 2 x RADEON HD 4870 (RV770);
* Interface: PCIe x16;
* GPU (ROPs/Shaders) clock rate: nominal 750/750 MHz;
* Memory clock rate, physical (effective): nominal 900 (3600) MHz;
* Bus width: 2 x 256-bit;
* Vertex processors: -;
* Pixel processors: -;
* Universal processors: 2 x 800;
* Texture processors: 2 x 40 (BLF/TLF);
* ROPs: 2 x 16;
* Size: 270 x 100 x 33 mm (the latter is max. width);
* PCB color: black;
* RAMDACs/TDMS: integrated into GPU;
* Outputs: 2 x DVI (Dual-Link/HDMI), TV-out (integrated into GPU);
* VIVO: -;
* Multi-GPU: Hardware CrossFire



http://www.digit-life.com/articles3/video/...3-part0-p1.html

This post has been edited by cwk88: Jul 17 2008, 08:26 AM