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Sapphire Radeon HD 4890 RV790 Video Card E-mail
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Written by Olin Coles   
Friday, 03 April 2009
Table of Contents: Page Index
Sapphire Radeon HD 4890 RV790 Video Card
Radeon HD 4890 Features
RV790 GPU Specifications
Radeon 4890 Closer Look
Video Card Testing Methodology
3DMark06 Benchmarks
COD 4 Fraps Benchmarks
Crysis Benchmark Results
Devil May Cry 4 Benchmark
Far Cry 2 Benchmark
World in Conflict Benchmarks
Radeon HD 4890 Temperatures
VGA Power Consumption
Radeon 4800-Series Final Thoughts
Radeon HD 4890 Conclusion

RV790 GPU Specifications

The SAPPHIRE HD 4890 series is based on a new GPU core from the ATI division of AMD. This features the same architecture as the successful HD 4870 series, with 800 stream processor units, 256-bit GDDR5 memory interface and integral hardware video decoder. It also features improved memory management architecture, and technical innovations that allow higher clock speeds and reduce standby power levels.

The SAPPHIRE HD 4890 100269SR now delivers a significantly higher level of performance than the previous generation. Two models are available at launch - the standard model has clock speeds of 850MHz (core) and 975MHz (memory). The SAPPHIRE HD 4890 OC Edition offers a higher specification for the enthusiast with enhanced clock speeds of 901MHz (core) and 1000MHz memory, making it the fastest ATI-based single core graphics card on the market. Both models use the PCI-Express Gen2 interface, and feature dual connectors for CrossFireX cables, allowing two or more cards to be used together on a CrossFireX compatible mainboard for even higher graphics performance.

  • Display Output: Dual DL-DVI-I+HDTV
  • RV790 Core Clock: 850 MHz
  • Memory Clock: 975 MHz (1950 MHz DDR)
  • PCI Express 2.0 x16 bus interface
  • 1GB /256bit GDDR5 memory interface
  • Dual-Slot Active Cooler
  • HDMI compliant via dongle
  • 7.1 Audio Channel Support
  • Microsoft DirectX 10.1 support
  • Shader Model 4.1 support
  • 1.36 TFLOPs Computer Power
  • 124.8 GBps Memory Bandwidth
  • Product

    Radeon HD 4850

    Radeon HD 4870

    Radeon HD 4890

    VPU Clock (MHz)

    625

    750

    850

    Die Process

    55nm

    55nm

    55nm

    GPU Transistors

    956M

    956M

    959M

    Compute Power

    1.0 TFLOPs

    1.2 TFLOPs

    1.36 TFLOPs

    Texture Units

    40

    40

    40

    Texture Fillrate

    25.0 GTexels/s

    30.0 GTexels/s

    34.0 GTexels/s

    Memory Size

    512 MB

    512/1024 MB

    1024 MB

    Memory Data Width

    256-bit

    256-bit

    256-bit

    Memory Type

    GDDR3

    GDDR5

    GDDR5

    Memory Speed (MHz)

    993 (2.0 GBps)

    900 (3.6 Gbps)

    975 (3.9 Gbps)

    ROPs

    16

    16

    16

    Pixel Fillrate

    10.0 GPixels/s

    12.0 GPixels/s

    13.6 GPixels/s

    Thermal Solution

    Single Slot Fan

    Dual Slot Fan

    Dual Slot Fan

    BUS Type

    PCI-E x 16, 2.0

    PCI-E x 16, 2.0

    PCI-E x 16, 2.0

    DirectX 10 / Shader Model 4.1

    Yes

    Yes

    Yes

    VGA Output

    Yes, by dongle

    Yes, by dongle

    Yes, by dongle

    DL-DVI-I

    x 2

    x 2

    x 2

    HDMI

    Yes, by dongle

    Yes, by dongle

    Yes, by dongle

    H.264 / VC-1 Acceleration

    Yes

    Yes

    Yes

    7.1 Audio Support

    Yes

    Yes

    Yes

    HDCP Support

    Yes

    Yes

    Yes

    HDTV Out

    Yes

    Yes

    Yes

    Form Factor

    ATX

    ATX

    ATX



     

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