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    GeForce 840M vs Radeon R7 M340

    Find out if it is worth upgrading your current GPU setup by comparing GeForce 840M and Radeon R7 M340. Here you can take a closer look at graphics cards specs, such as core clock speed, memory type and size, display connectors, etc. The price, overall benchmark and gaming performances are usually defining factors when it comes to choosing between GeForce 840M and Radeon R7 M340. Make sure that the graphics card has compatible dimensions and will properly fit in your new or current computer case. Also these graphics cards may have different system power recommendations, so take that into consideration and upgrade your PSU if necessary.
    GeForce 840M Check Price
    Radeon R7 M340 Check Price

    GeForce 840M and Radeon R7 M340 are Laptop Graphics Cards

    Note: GeForce 840M and Radeon R7 M340 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 Radeon R7 M340 here:

    GeForce 840M Laptops
    Radeon R7 M340 Laptops

    Main Specs

      GeForce 840M Radeon R7 M340
    Power consumption (TDP) 33 Watt
    Interface PCIe 3.0 x8 PCIe 3.0 x8
    Supplementary power connectors None
    Memory type DDR3 DDR3
    Maximum RAM amount 4 GB 4 GB
    Display Connectors No outputs No outputs
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    • Both video cards are using PCIe 3.0 x8 interface connection to a motherboard.
    • GeForce 840M and Radeon R7 M340 have maximum RAM of 4 GB.
    • Both cards are used in Laptops.
    • GeForce 840M is build with Maxwell architecture, and Radeon R7 M340 - with GCN.
    • Core clock speed of GeForce 840M is 8 MHz higher, than Radeon R7 M340.
    • GeForce 840M and Radeon R7 M340 are manufactured by 28 nm process technology.
    • Memory clock speed of GeForce 840M is 1000 MHz higher, than Radeon R7 M340.

    Game benchmarks

    high / 1080p 1−2 0−1
    ultra / 1080p 0−1 −
    QHD / 1440p 0−1 0−1
    low / 720p 12−14 1−2
    medium / 1080p 3−4 0−1
    The average gaming FPS of GeForce 840M in Assassin's Creed Odyssey is 1200% more, than Radeon R7 M340.

    Full Specs

      GeForce 840M Radeon R7 M340
    Architecture Maxwell GCN
    Code name N15S-GT Meso Pro DDR3
    Type Laptop Laptop
    Release date 12 March 2014 16 June 2015
    Pipelines 384 320
    Core clock speed 1029 MHz 1021 MHz
    Boost Clock 1124 MHz 1021 MHz
    Transistor count 950 million
    Manufacturing process technology 28 nm 28 nm
    Texture fill rate 17.98 17.16
    Floating-point performance 863.2 gflops 549.1 gflops
    Memory bus width 64 Bit 128 Bit
    Memory clock speed 2000 MHz 1000 MHz
    Memory bandwidth 16.02 GB/s 16 GB/s
    Shared memory - -
    DirectX 12 (11_0)
    Shader Model 5.1 5.1
    OpenGL 4.5 4.4
    OpenCL 1.2 Not Listed
    Vulkan 1.1.126 +
    CUDA +
    FreeSync +
    Bus support PCI Express 2.0, PCI Express 3.0 PCIe 3.0
    Bitcoin / BTC (SHA256) 92 Mh/s 74 Mh/s
    Laptop size medium sized
    Optimus +
    Eyefinity +
    HD3D +
    PowerTune +
    DualGraphics +
    ZeroCore +
    Switchable graphics +
    Mantle +
    Compute units 6
    GPU Boost 2.0
    GameWorks +
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