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    GeForce GT 645M vs Quadro K620M

    When comparing GeForce GT 645M and Quadro K620M, 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 GT 645M and Quadro K620M is the price. Does the additional cost justify the performance hit? Our comparison should help you make the right decision.
    GeForce GT 645M Check Price
    Quadro K620M Check Price

    GeForce GT 645M and Quadro K620M are Laptop Graphics Cards

    Note: GeForce GT 645M and Quadro K620M 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 GT 645M or Quadro K620M here:

    GeForce GT 645M Laptops
    Quadro K620M Laptops

    Main Specs

      GeForce GT 645M Quadro K620M
    Power consumption (TDP) 32 Watt 30 Watt
    Interface PCIe 3.0 x16 MXM-A (3.0)
    Supplementary power connectors None
    Memory type DDR3\GDDR5 DDR3
    Maximum RAM amount 2 GB 2 GB
    Display Connectors No outputs No outputs
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    • GeForce GT 645M has 6% more power consumption, than Quadro K620M.
    • GeForce GT 645M is connected by PCIe 3.0 x16, and Quadro K620M uses MXM-A (3.0) interface.
    • GeForce GT 645M and Quadro K620M have maximum RAM of 2 GB.
    • GeForce GT 645M is used in Laptops, and Quadro K620M - in Mobile workstations.
    • GeForce GT 645M is build with Kepler architecture, and Quadro K620M - with Maxwell.
    • GeForce GT 645M and Quadro K620M are manufactured by 28 nm process technology.
    • Memory clock speed of Quadro K620M is 200 MHz higher, than GeForce GT 645M.

    Game benchmarks

    high / 1080p 1−2 3−4
    ultra / 1080p 0−1 1−2
    QHD / 1440p 0−1 0−1
    low / 720p 12−14 14−16
    medium / 1080p 2−3 5−6
    The average gaming FPS of Quadro K620M in Assassin's Creed Odyssey is 60% more, than GeForce GT 645M.

    Full Specs

      GeForce GT 645M Quadro K620M
    Architecture Kepler Maxwell
    Code name N13P-GS GM108
    Type Laptop Mobile workstation
    Release date 22 March 2012 1 March 2015
    Pipelines 384 384
    Core clock speed 1029 MHz
    Boost Clock 1124 MHz
    Transistor count 1,270 million
    Manufacturing process technology 28 nm 28 nm
    Texture fill rate 22.7 billion/sec 17.98
    Floating-point performance 544.5 gflops 863.2 gflops
    Memory bus width 128bit 64 Bit
    Memory clock speed 1800 MHz 2000 MHz
    Memory bandwidth 14.4 GB/s
    Shared memory - -
    DirectX 12 API 12
    Shader Model 5.1 5
    OpenGL 4.5 4.5
    OpenCL 1.1 1.2
    Vulkan 1.1.126 1.1.126
    CUDA + +
    CUDA cores 384
    Bus support PCI Express 2.0, PCI Express 3.0
    HDMI +
    HDCP +
    Maximum VGA resolution Up to 2048x1536
    3D Blu-Ray +
    Bitcoin / BTC (SHA256) 19 Mh/s 92 Mh/s
    Laptop size medium sized
    Optimus + +
    Display Port 1.2
    nView Display Management +
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