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    GeForce GT 640M vs Radeon HD 4870

    If you are going to buy a new graphics card and are choosing between GeForce GT 640M and Radeon HD 4870, 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 GeForce GT 640M stacks up against Radeon HD 4870, check out specs charts below.
    GeForce GT 640M Check Price
    Radeon HD 4870 Check Price

    GeForce GT 640M is a Laptop Graphics Card

    Note: GeForce GT 640M 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 GeForce GT 640M here:

    GeForce GT 640M Laptops

    Main Specs

      GeForce GT 640M Radeon HD 4870
    Power consumption (TDP) 32 Watt 150 Watt
    Interface PCIe 3.0 x16 PCIe 2.0 x16
    Supplementary power connectors 2x 6-pin
    Memory type DDR3\GDDR5 GDDR5
    Maximum RAM amount 2 GB 1 GB
    Display Connectors No outputs 2x DVI, 1x S-Video
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    • Radeon HD 4870 has 368% more power consumption, than GeForce GT 640M.
    • GeForce GT 640M is connected by PCIe 3.0 x16, and Radeon HD 4870 uses PCIe 2.0 x16 interface.
    • GeForce GT 640M has 1 GB more memory, than Radeon HD 4870.
    • GeForce GT 640M is used in Laptops, and Radeon HD 4870 - in Desktops.
    • GeForce GT 640M is build with Kepler architecture, and Radeon HD 4870 - with TeraScale.
    • GeForce GT 640M is manufactured by 28 nm process technology, and Radeon HD 4870 - by 55 nm process technology.
    • Memory clock speed of Radeon HD 4870 is 1800 MHz higher, than GeForce GT 640M.

    Game benchmarks

    high / 1080p 0−1 3−4
    ultra / 1080p 0−1 1−2
    QHD / 1440p 0−1 0−1
    low / 720p 10−12 14−16
    medium / 1080p 2−3 6−7
    The average gaming FPS of Radeon HD 4870 in Assassin's Creed Odyssey is 66% more, than GeForce GT 640M.

    Full Specs

      GeForce GT 640M Radeon HD 4870
    Architecture Kepler TeraScale
    Code name N13P-GS RV770
    Type Laptop Desktop
    Release date 22 March 2012 25 June 2008
    Pipelines 384 800
    Core clock speed 750 MHz
    Boost Clock 645 MHz
    Transistor count 1,270 million 956 million
    Manufacturing process technology 28 nm 55 nm
    Texture fill rate 30.00
    Floating-point performance 480.0 gflops 1,200.0 gflops
    Length 250 mm
    Memory bus width 128bit 256 Bit
    Memory clock speed 1800 - 4000 MHz 3600 MHz
    Memory bandwidth 115.2 GB/s
    Shared memory -
    DirectX 12 API 10.1 (10_1)
    Shader Model 5.1 4.1
    OpenGL 4.5 3.3
    OpenCL 1.1 1.1
    Vulkan 1.1.126 N/A
    CUDA +
    CUDA cores 384
    Bus support PCI Express 2.0, PCI Express 3.0
    HDMI +
    HDCP +
    Maximum VGA resolution Up to 2048x1536
    3D Blu-Ray +
    Bitcoin / BTC (SHA256) 18 Mh/s
    Laptop size medium sized
    Optimus +
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