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    GeForce 840M vs GeForce 940MX

    When comparing GeForce 840M and GeForce 940MX, we look primarily at benchmarks and game tests. But it is not only about the numbers. Often you can find third-party models with higher clock speeds, better cooling, or a customizable RGB lighting. Not all of them will have all the features you need. Another thing to consider is the port selection. Most graphics cards have at least one DisplayPort and HDMI interface, but some monitors require DVI. Before you buy, check the TDP of the graphics card - this characteristic will help you estimate the consumption of the graphics card. You may even have to upgrade your PSU to meet its requirements. An important factor when choosing between GeForce 840M and GeForce 940MX is the price. Does the additional cost justify the performance hit? Our comparison should help you make the right decision.
    GeForce 840M Check Price
    GeForce 940MX Check Price

    GeForce 840M and GeForce 940MX are Laptop Graphics Cards

    Note: GeForce 840M and GeForce 940MX are only used in laptop graphics. They have 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 or GeForce 940MX here:

    GeForce 840M Laptops
    GeForce 940MX Laptops

    Main Specs

      GeForce 840M GeForce 940MX
    Power consumption (TDP) 33 Watt 23 Watt
    Interface PCIe 3.0 x8 PCIe 3.0 x8
    Supplementary power connectors None
    Memory type DDR3 DDR3, GDDR5
    Maximum RAM amount 4 GB 4 GB
    Display Connectors No outputs No outputs
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    • GeForce 840M has 43% more power consumption, than GeForce 940MX.
    • Both video cards are using PCIe 3.0 x8 interface connection to a motherboard.
    • GeForce 840M and GeForce 940MX have maximum RAM of 4 GB.
    • Both cards are used in Laptops.
    • GeForce 840M and GeForce 940MX are build with Maxwell architecture.
    • Core clock speed of GeForce 940MX is 93 MHz higher, than GeForce 840M.
    • GeForce 840M and GeForce 940MX are manufactured by 28 nm process technology.
    • Memory clock speed of GeForce 940MX is 2000 MHz higher, than GeForce 840M.

    Game benchmarks

    high / 1080p 1−2 7−8
    ultra / 1080p 0−1 4−5
    QHD / 1440p 0−1 0−1
    low / 720p 12−14 16−18
    medium / 1080p 3−4 8−9
    The average gaming FPS of GeForce 940MX in Assassin's Creed Odyssey is 83% more, than GeForce 840M.

    Full Specs

      GeForce 840M GeForce 940MX
    Architecture Maxwell Maxwell
    Code name N15S-GT N16S-GTR-B/S
    Type Laptop Laptop
    Release date 12 March 2014 10 March 2016
    Pipelines 384 384
    Core clock speed 1029 MHz 1122 MHz
    Boost Clock 1124 MHz 1242 MHz
    Transistor count 1,870 million
    Manufacturing process technology 28 nm 28 nm
    Texture fill rate 17.98 23.83
    Floating-point performance 863.2 gflops 762.6 gflops
    Memory bus width 64 Bit 64 Bit
    Memory clock speed 2000 MHz 4000 MHz
    Memory bandwidth 16.02 GB/s 40.1 GB/s
    Shared memory - -
    DirectX 12 (11_0) 12 (11_0)
    Shader Model 5.1 5.1
    OpenGL 4.5 4.5
    OpenCL 1.2 1.2
    Vulkan 1.1.126 1.1
    CUDA + +
    Bus support PCI Express 2.0, PCI Express 3.0 PCI Express 3.0
    Bitcoin / BTC (SHA256) 92 Mh/s 102 Mh/s
    Laptop size medium sized medium sized
    Optimus + +
    GPU Boost 2.0 2.0
    GameWorks + +
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