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    GeForce 845M vs Radeon R9 M390X

    If you are going to buy a new graphics card and are choosing between GeForce 845M and Radeon R9 M390X, 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 845M stacks up against Radeon R9 M390X, check out specs charts below.
    GeForce 845M Check Price
    Radeon R9 M390X Check Price

    GeForce 845M and Radeon R9 M390X are Laptop Graphics Cards

    Note: GeForce 845M and Radeon R9 M390X 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 845M or Radeon R9 M390X here:

    GeForce 845M Laptops
    Radeon R9 M390X Laptops

    Main Specs

      GeForce 845M Radeon R9 M390X
    Power consumption (TDP) 45 Watt 100 Watt
    Interface PCIe 3.0 x8 PCIe 3.0 x16
    Supplementary power connectors None
    Memory type DDR3, GDDR5 GDDR5
    Maximum RAM amount 2 GB 4 GB
    Display Connectors No outputs No outputs
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    • Radeon R9 M390X has 122% more power consumption, than GeForce 845M.
    • GeForce 845M is connected by PCIe 3.0 x8, and Radeon R9 M390X uses PCIe 3.0 x16 interface.
    • Radeon R9 M390X has 2 GB more memory, than GeForce 845M.
    • Both cards are used in Laptops.
    • GeForce 845M is build with Maxwell architecture, and Radeon R9 M390X - with GCN 3.
    • Core clock speed of GeForce 845M is 348 MHz higher, than Radeon R9 M390X.
    • GeForce 845M and Radeon R9 M390X are manufactured by 28 nm process technology.

    Game benchmarks

    high / 1080p 3−4 21−24
    ultra / 1080p 1−2 12−14
    QHD / 1440p 0−1 8−9
    4K / 2160p − 5−6
    low / 720p 14−16 40−45
    medium / 1080p 6−7 27−30
    The average gaming FPS of Radeon R9 M390X in Assassin's Creed Odyssey is 333% more, than GeForce 845M.

    Full Specs

      GeForce 845M Radeon R9 M390X
    Architecture Maxwell GCN 3
    Code name GM108 Amethyst (XT) / Tonga
    Type Laptop Laptop
    Release date 12 March 2014 9 June 2015
    Pipelines 384 2048
    Core clock speed 1071 MHz 723 MHz
    Boost Clock 1150 MHz
    Transistor count 1,870 million 5,000 million
    Manufacturing process technology 28 nm 28 nm
    Texture fill rate 37.63 92.54
    Floating-point performance 883.7 gflops 2,961 gflops
    Memory bus width 64/128 Bit 256 Bit
    Memory clock speed 2000 - 5000 MHz
    Memory bandwidth 40.1 GB/s 160.0 GB/s
    Shared memory - -
    DirectX 12 (11_0)
    Shader Model 5.1 6.3
    OpenGL 4.6 4.4
    OpenCL 1.2 Not Listed
    Vulkan 1.1.126 +
    CUDA +
    FreeSync +
    Bus support PCIe 3.0
    Bitcoin / BTC (SHA256) 76 Mh/s
    Laptop size medium sized large
    Optimus +
    Eyefinity +
    HD3D +
    PowerTune +
    DualGraphics +
    ZeroCore +
    Switchable graphics +
    Mantle +
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