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    Mobility Radeon HD 3870 X2 vs Radeon HD 4770

    If you are going to buy a new graphics card and are choosing between Mobility Radeon HD 3870 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 3870 X2 stacks up against Radeon HD 4770, check out specs charts below.
    Mobility Radeon HD 3870 X2 Check Price
    Radeon HD 4770

    Mobility Radeon HD 3870 X2 is a Laptop Graphics Card

    Note: Mobility Radeon HD 3870 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 3870 X2 here:

    Mobility Radeon HD 3870 X2 Laptops

    Main Specs

      Mobility Radeon HD 3870 X2 Radeon HD 4770
    Power consumption (TDP) 110 Watt 80 Watt
    Interface PCIe 2.0 x16 PCIe 2.0 x16
    Supplementary power connectors 1x 6-pin
    Memory type GDDR3 GDDR5
    Maximum RAM amount 512 MB 512 MB
    Display Connectors No outputs 2x DVI, 1x S-Video
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    • Mobility Radeon HD 3870 X2 has 37% more power consumption, than Radeon HD 4770.
    • Both video cards are using PCIe 2.0 x16 interface connection to a motherboard.
    • Mobility Radeon HD 3870 X2 and Radeon HD 4770 have maximum RAM of 512 GB.
    • Mobility Radeon HD 3870 X2 is used in Laptops, and Radeon HD 4770 - in Desktops.
    • Mobility Radeon HD 3870 X2 is build with RV6xx architecture, and Radeon HD 4770 - with TeraScale.
    • Core clock speed of Radeon HD 4770 is 90 MHz higher, than Mobility Radeon HD 3870 X2.
    • Mobility Radeon HD 3870 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 2350 MHz higher, than Mobility Radeon HD 3870 X2.

    Game benchmarks

    high / 1080p 6−7 1−2
    ultra / 1080p 4−5 0−1
    QHD / 1440p 0−1 0−1
    low / 720p 16−18 10−12
    medium / 1080p 8−9 2−3
    The average gaming FPS of Mobility Radeon HD 3870 X2 in Assassin's Creed Odyssey is 100% more, than Radeon HD 4770.

    Full Specs

      Mobility Radeon HD 3870 X2 Radeon HD 4770
    Architecture RV6xx TeraScale
    Code name M88-XT CF RV740
    Type Laptop Desktop
    Release date 1 September 2008 28 April 2009
    Pipelines 640 640
    Core clock speed 660 MHz 750 MHz
    Transistor count 666 million 826 million
    Manufacturing process technology 55 nm 40 nm
    Texture fill rate 10.56 24.00
    Floating-point performance 2x 422.4 gflops 960.0 gflops
    Length 203 mm
    Memory bus width 256 Bit 128 Bit
    Memory clock speed 850 MHz 3200 MHz
    Memory bandwidth 54.4 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 N/A 1.1
    Vulkan N/A N/A
    Laptop size large
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