Vapor-X Cooling
Vapor Chamber Technology is based on the same principles as heatpipe technology. A liquid coolant is vaporised at a hot surface, the resulting vapor is condensed at a cold surface then the liquid is returned to the hot surface. The recirculation process is controlled by a patented wick system. SAPPHIRE Vapor-X flattens the whole system into a slim chamber - which in the graphics application is mounted in contact with the surface of the graphics chip.
Redefine HD Gaming
TeraScale Graphics Engine
The TeraScale graphics engine in the ATI Radeonâ„¢ HD 4890 features over one teraFLOPS, nearly one billion transistors and 800 stream processors so you can enjoy the high resolutions and fast frame rates previously only available with dual-card systems1.
Advanced Memory
GDDR5 provides twice the data per pin of GDDR3 memory at the same clock speeds.
Enhanced Anti-Aliasing & Anisotropic Filtering
High performance anisotropic filtering and 24x custom filter anti-aliasing (CFAA) smooth jagged edges and create true-to-life graphics, for everything from grass to facial features.
DirectX® 10.1
Play today while preparing for tomorrow with state-of-the-art DirectX 10.1 graphics capabilities.
ATI CrossFireXâ„¢ Technology
ATI CrossFireXâ„¢ technology with up to quad GPU support offers superior scalability so your system is ready to level up when you are2.
PCI Express 2.0
Support for PCI Express 2.0 will prepare you for bandwidth-hungry games and 3D applications.
Power to Spare
This GPU has the brute processing power needed for physics, artificial intelligence, stream computing and ray tracing calculations.
Go Beyond HD Video
Unified Video Decoder 2 (UVD 2)
UVD 2 frees up your CPU for other tasks so you get The Ultimate Visual Experienceâ„¢ for even the most processing-intensive content, including VC-1, H.264 and now MPEG-2. Also, take full advantage of Blu-ray functionality with dual-stream, picture in picture (PIP) capabilities1,2.
Accelerated Video Transcoding (AVT)
With ATI Stream technology, owners of ATI Radeonâ„¢ HD 4800 series graphics cards can help accelerate the conversion of standard and HD video into multiple formats for use on differing consumer electronics devices. The ATI Video Converter, designed to enable GPU transcoding of HD video streams, is currently available.
Upscale Beyond 1080p
Watch the hottest Blu-ray movies or other HD content at full 1080p display resolution and beyond3.
Enhanced DVD Upscaling
Watch standard DVD movies in near high-definition quality with DVD upscaling. The GPU uses post processing algorithms to enhance standard and low resolution videos and movies on your HD display.
Dynamic Contrast
Dynamic Contrast automatically adjusts the contrast and brightness during scenes to consistently deliver a crisp, vibrant picture.
HDMI
Enjoy the latest audio technologies using HDMI with 7.1 digital surround sound support. Also, xvYCC support allows the user to enjoy a wider range of color when connected to a capable HDTV.

Break-through Efficiency

Dynamic Power Management
ATI Radeon HD 4890 GPUs deliver high performance when needed and conserve power when the demand on the graphics processor is low.

Energy Efficient Manufacturing Process
Third generation 55nm chip uses the industry’s most energy efficient manufacturing process.
ATI Radeon HD 4890 System Requirements
PCI Express® based PC is required with one X16 lane graphics slot available on the motherboard
500 Watt or greater power supply with 1x 75W 6-pin PCI Express® power connector and 1 x 150 Watt 8-pin PCI Express ® connector recommended (600 Watt and four 6-pin connectors for ATI CrossFireX™ technology in dual mode)�
1GB of system memory
Installation software requires CD-ROM drive
DVD playback requires DVD drive
Blu-rayâ„¢ / HD DVD playback requires Blu-ray / HD DVD drive
For a complete ATI CrossFireXâ„¢ system, a second ATI Radeonâ„¢ HD 4890 graphics card, an ATI CrossFireX Ready motherboard and one ATI CrossFireX Bridge Interconnect cable per board are required.
Features

Factory overclocked at 960 MHz.
Industry Leading Vapor-X Technology
1x 6 Pin + 1 x 8 Pin External Power Connector
1 GB of GDDR5 memory
DirectX® 10.1 support
800 stream processing units
24x custom filter anti-aliasing (CFAA) and high performance anisotropic filtering
Quad mode ATI CrossFireXâ„¢ multi-GPU support for highly scalable performance1
PCI Express® 2.0 support
Dynamic geometry acceleration
Game physics processing capability

Specification
 I/O Output: Dual DL-DVI-I+HDTV
Core Clock: 960 MHz
Memory Clock: 1050 MHz, 4.2 Gbps
PCI Express 2.0 x16 bus interface
1024MB /256bit GDDR5 memory interface
Dual Slot Vapor-X Cooler with Heatpipes
HDMI compliant via dongle
7.1 Audio Channel Support
Microsoft® DirectX® 10.1 support
Shader Model 4.1 support