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    Quadro K620M vs Radeon R9 M390X

    When comparing Quadro K620M and Radeon R9 M390X, 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 Quadro K620M and Radeon R9 M390X is the price. Does the additional cost justify the performance hit? Our comparison should help you make the right decision.
    Quadro K620M Check Price
    Radeon R9 M390X Check Price

    Quadro K620M and Radeon R9 M390X are Laptop Graphics Cards

    Note: Quadro K620M 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 Quadro K620M or Radeon R9 M390X here:

    Quadro K620M Laptops
    Radeon R9 M390X Laptops

    Main Specs

      Quadro K620M Radeon R9 M390X
    Power consumption (TDP) 30 Watt 100 Watt
    Interface MXM-A (3.0) PCIe 3.0 x16
    Supplementary power connectors None None
    Memory type DDR3 GDDR5
    Maximum RAM amount 2 GB 4 GB
    Display Connectors No outputs No outputs
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    • Radeon R9 M390X has 233% more power consumption, than Quadro K620M.
    • Quadro K620M is connected by MXM-A (3.0), and Radeon R9 M390X uses PCIe 3.0 x16 interface.
    • Radeon R9 M390X has 2 GB more memory, than Quadro K620M.
    • Quadro K620M is used in Mobile workstations, and Radeon R9 M390X - in Laptops.
    • Quadro K620M is build with Maxwell architecture, and Radeon R9 M390X - with GCN 3.
    • Core clock speed of Quadro K620M is 306 MHz higher, than Radeon R9 M390X.
    • Quadro K620M 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 5−6 27−30
    The average gaming FPS of Radeon R9 M390X in Assassin's Creed Odyssey is 333% more, than Quadro K620M.

    Full Specs

      Quadro K620M Radeon R9 M390X
    Architecture Maxwell GCN 3
    Code name GM108 Amethyst (XT) / Tonga
    Type Mobile workstation Laptop
    Release date 1 March 2015 9 June 2015
    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
    Memory bandwidth 14.4 GB/s 160.0 GB/s
    Shared memory - -
    DirectX 12
    Shader Model 5 6.3
    OpenGL 4.5 4.4
    OpenCL 1.2 Not Listed
    Vulkan 1.1.126 +
    CUDA +
    FreeSync +
    Bus support PCIe 3.0
    Bitcoin / BTC (SHA256) 92 Mh/s
    Laptop size large
    Optimus +
    Eyefinity +
    HD3D +
    PowerTune +
    DualGraphics +
    ZeroCore +
    Switchable graphics +
    Mantle +
    Display Port 1.2
    nView Display Management +
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