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    Mobility Radeon HD 4870 X2 vs Radeon HD 4770

    If you are going to buy a new graphics card and are choosing between Mobility Radeon HD 4870 X2 and Radeon HD 4770, there are a couple of things to consider. Cards with more VRAM in general perform better and allow you to play on higher graphics settings. Size also makes a difference. A model with a large heatsink can occupy up to three expansion slots on a motherboard. Be sure you have enough room in your PC case. When comparing GPUs with different architectures, more processing cores and even higher TFLOPS will not always translate to better performance. To help you decide which GPU you need, we have measured frame rates in a number of popular games. For more on how the Mobility Radeon HD 4870 X2 stacks up against Radeon HD 4770, check out specs charts below.
    Mobility Radeon HD 4870 X2 Check Price
    Radeon HD 4770

    Mobility Radeon HD 4870 X2 is a Laptop Graphics Card

    Note: Mobility Radeon HD 4870 X2 is only used in laptop graphics. It has lower GPU clock speed compared to the desktop variant, which results in lower power consumption, but also 10-30% lower gaming performance. Check available laptop models with Mobility Radeon HD 4870 X2 here:

    Mobility Radeon HD 4870 X2 Laptops

    Main Specs

      Mobility Radeon HD 4870 X2 Radeon HD 4770
    Power consumption (TDP) 80 Watt
    Interface PCIe 2.0 x16 PCIe 2.0 x16
    Supplementary power connectors 1x 6-pin
    Memory type GDDR3, GDDR5 GDDR5
    Maximum RAM amount 2 GB 512 MB
    Display Connectors No outputs 2x DVI, 1x S-Video
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    • Both video cards are using PCIe 2.0 x16 interface connection to a motherboard.
    • Radeon HD 4770 has 510 GB more memory, than Mobility Radeon HD 4870 X2.
    • Mobility Radeon HD 4870 X2 is used in Laptops, and Radeon HD 4770 - in Desktops.
    • Mobility Radeon HD 4870 X2 is build with Terascale 1 architecture, and Radeon HD 4770 - with TeraScale.
    • Core clock speed of Radeon HD 4770 is 200 MHz higher, than Mobility Radeon HD 4870 X2.
    • Mobility Radeon HD 4870 X2 is manufactured by 55 nm process technology, and Radeon HD 4770 - by 40 nm process technology.
    • Memory clock speed of Radeon HD 4770 is 2312 MHz higher, than Mobility Radeon HD 4870 X2.

    Game benchmarks

    high / 1080p 9−10 1−2
    ultra / 1080p 5−6 0−1
    QHD / 1440p 0−1 0−1
    low / 720p 21−24 10−12
    medium / 1080p 12−14 2−3
    The average gaming FPS of Mobility Radeon HD 4870 X2 in Assassin's Creed Odyssey is 200% more, than Radeon HD 4770.

    Full Specs

      Mobility Radeon HD 4870 X2 Radeon HD 4770
    Architecture Terascale 1 TeraScale
    Code name M98-XT RV740
    Type Laptop Desktop
    Release date 9 January 2009 28 April 2009
    Pipelines 1600 640
    Core clock speed 550 MHz 750 MHz
    Transistor count 956 million 826 million
    Manufacturing process technology 55 nm 40 nm
    Texture fill rate 22.00 24.00
    Floating-point performance 2x 880.0 gflops 960.0 gflops
    Length 203 mm
    Memory bus width 256 Bit 128 Bit
    Memory clock speed 888 MHz 3200 MHz
    Memory bandwidth 89.6 GB/s 51.2 GB/s
    Shared memory -
    DirectX 10.1 (10_1) 10.1 (10_1)
    Shader Model 4.1 4.1
    OpenGL 3.3 3.3
    OpenCL 1.1 1.1
    Vulkan N/A N/A
    Laptop size large
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