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    GeForce 840M vs Radeon R9 M395X

    Find out if it is worth upgrading your current GPU setup by comparing GeForce 840M and Radeon R9 M395X. 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 R9 M395X. 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 R9 M395X Check Price

    GeForce 840M and Radeon R9 M395X are Laptop Graphics Cards

    Note: GeForce 840M and Radeon R9 M395X 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 R9 M395X here:

    GeForce 840M Laptops
    Radeon R9 M395X Laptops

    Main Specs

      GeForce 840M Radeon R9 M395X
    Power consumption (TDP) 33 Watt 250 Watt
    Interface PCIe 3.0 x8 PCIe 3.0 x16
    Supplementary power connectors None
    Memory type DDR3 GDDR5
    Maximum RAM amount 4 GB 4 GB
    Display Connectors No outputs No outputs
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    • Radeon R9 M395X has 657% more power consumption, than GeForce 840M.
    • GeForce 840M is connected by PCIe 3.0 x8, and Radeon R9 M395X uses PCIe 3.0 x16 interface.
    • GeForce 840M and Radeon R9 M395X have maximum RAM of 4 GB.
    • Both cards are used in Laptops.
    • GeForce 840M is build with Maxwell architecture, and Radeon R9 M395X - with GCN 3.
    • Core clock speed of GeForce 840M is 306 MHz higher, than Radeon R9 M395X.
    • GeForce 840M and Radeon R9 M395X are manufactured by 28 nm process technology.
    • Memory clock speed of GeForce 840M is 750 MHz higher, than Radeon R9 M395X.

    Game benchmarks

    high / 1080p 1−2 24−27
    ultra / 1080p 0−1 14−16
    QHD / 1440p 0−1 9−10
    4K / 2160p − 6−7
    low / 720p 12−14 45−50
    medium / 1080p 3−4 30−35
    The average gaming FPS of Radeon R9 M395X in Assassin's Creed Odyssey is 483% more, than GeForce 840M.

    Full Specs

      GeForce 840M Radeon R9 M395X
    Architecture Maxwell GCN 3
    Code name N15S-GT Amethyst XT
    Type Laptop Laptop
    Release date 12 March 2014 16 October 2014
    Pipelines 384 2048
    Core clock speed 1029 MHz 723 MHz
    Boost Clock 1124 MHz
    Transistor count 5,000 million
    Manufacturing process technology 28 nm 28 nm
    Texture fill rate 17.98 92.54
    Floating-point performance 863.2 gflops 2,961 gflops
    Memory bus width 64 Bit 256 Bit
    Memory clock speed 2000 MHz 1250 MHz
    Memory bandwidth 16.02 GB/s 160.0 GB/s
    Shared memory - -
    DirectX 12 (11_0)
    Shader Model 5.1 6.3
    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 413 Mh/s
    Laptop size medium sized large
    Optimus +
    Eyefinity +
    HD3D +
    PowerTune +
    DualGraphics +
    TrueAudio +
    ZeroCore +
    Switchable graphics +
    Mantle +
    GPU Boost 2.0
    GameWorks +
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