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    GeForce 840M vs Radeon HD 6870

    If you are going to buy a new graphics card and are choosing between GeForce 840M and Radeon HD 6870, 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 840M stacks up against Radeon HD 6870, check out specs charts below.
    GeForce 840M Check Price
    Radeon HD 6870 Check Price

    GeForce 840M is a Laptop Graphics Card

    Note: GeForce 840M 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 840M here:

    GeForce 840M Laptops

    Main Specs

      GeForce 840M Radeon HD 6870
    Power consumption (TDP) 33 Watt 151 Watt
    Interface PCIe 3.0 x8 PCIe 2.0 x16
    Supplementary power connectors 2x 6-pin
    Memory type DDR3 GDDR5
    Maximum RAM amount 4 GB 1 GB
    Display Connectors No outputs 2x DVI, 1x HDMI, 2x mini-DisplayPort
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    • Radeon HD 6870 has 357% more power consumption, than GeForce 840M.
    • GeForce 840M is connected by PCIe 3.0 x8, and Radeon HD 6870 uses PCIe 2.0 x16 interface.
    • GeForce 840M has 3 GB more memory, than Radeon HD 6870.
    • GeForce 840M is used in Laptops, and Radeon HD 6870 - in Desktops.
    • GeForce 840M is build with Maxwell architecture, and Radeon HD 6870 - with Terascale 2.
    • GeForce 840M is manufactured by 28 nm process technology, and Radeon HD 6870 - by 40 nm process technology.
    • Memory clock speed of GeForce 840M is 950 MHz higher, than Radeon HD 6870.

    Game benchmarks

    high / 1080p 1−2 10−12
    ultra / 1080p 0−1 6−7
    QHD / 1440p 0−1 1−2
    low / 720p 12−14 24−27
    medium / 1080p 3−4 12−14
    The average gaming FPS of Radeon HD 6870 in Assassin's Creed Odyssey is 166% more, than GeForce 840M.

    Full Specs

      GeForce 840M Radeon HD 6870
    Architecture Maxwell Terascale 2
    Code name N15S-GT RV940 Barts
    Type Laptop Desktop
    Release date 12 March 2014 22 October 2010
    Pipelines 384 1120
    Core clock speed 1029 MHz
    Boost Clock 1124 MHz 900 MHz
    Transistor count 1,700 million
    Manufacturing process technology 28 nm 40 nm
    Texture fill rate 17.98 50.40
    Floating-point performance 863.2 gflops 2,016.0 gflops
    Length 220 mm
    Memory bus width 64 Bit 256 Bit
    Memory clock speed 2000 MHz 1050 MHz
    Memory bandwidth 16.02 GB/s 134.4 GB/s
    Shared memory - -
    DirectX 12 (11_0)
    Shader Model 5.1 5.0
    OpenGL 4.5 4.4
    OpenCL 1.2 1.2
    Vulkan 1.1.126
    CUDA +
    Bus support PCI Express 2.0, PCI Express 3.0 PCIe 2.0 x16
    HDMI +
    Bitcoin / BTC (SHA256) 92 Mh/s 213 Mh/s
    Laptop size medium sized
    Optimus +
    Eyefinity +
    Design reference
    CrossFire +
    GPU Boost 2.0
    GameWorks +
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