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    GeForce GT 645M vs Radeon R9 280X

    Find out if it is worth upgrading your current GPU setup by comparing GeForce GT 645M and Radeon R9 280X. 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 GT 645M and Radeon R9 280X. 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 GT 645M Check Price
    Radeon R9 280X Check Price

    GeForce GT 645M is a Laptop Graphics Card

    Note: GeForce GT 645M is only used in laptop graphics. It has 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 here:

    GeForce GT 645M Laptops

    Main Specs

      GeForce GT 645M Radeon R9 280X
    Power consumption (TDP) 32 Watt 250 Watt
    Interface PCIe 3.0 x16 PCIe 3.0 x16
    Supplementary power connectors 1 x 6-pin + 1 x 8-pin
    Memory type DDR3\GDDR5 GDDR5
    Maximum RAM amount 2 GB 3 GB
    Display Connectors No outputs 2x DVI, 1x HDMI, 1x DisplayPort
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    • Radeon R9 280X has 681% more power consumption, than GeForce GT 645M.
    • Both video cards are using PCIe 3.0 x16 interface connection to a motherboard.
    • Radeon R9 280X has 1 GB more memory, than GeForce GT 645M.
    • GeForce GT 645M is used in Laptops, and Radeon R9 280X - in Desktops.
    • GeForce GT 645M is build with Kepler architecture, and Radeon R9 280X - with GCN.
    • GeForce GT 645M and Radeon R9 280X are manufactured by 28 nm process technology.

    Game benchmarks

    high / 1080p 1−2 35−40
    ultra / 1080p 0−1 21−24
    QHD / 1440p 0−1 16−18
    4K / 2160p − 10−11
    low / 720p 12−14 60−65
    medium / 1080p 2−3 40−45
    The average gaming FPS of Radeon R9 280X in Assassin's Creed Odyssey is 840% more, than GeForce GT 645M.

    Full Specs

      GeForce GT 645M Radeon R9 280X
    Architecture Kepler GCN
    Code name N13P-GS Thaiti XTL
    Type Laptop Desktop
    Release date 22 March 2012 8 October 2013
    Pipelines 384 2048
    Boost Clock 1000 MHz
    Transistor count 1,270 million 4,313 million
    Manufacturing process technology 28 nm 28 nm
    Texture fill rate 22.7 billion/sec 128.0
    Floating-point performance 544.5 gflops 4,096 gflops
    Length 275 mm
    Memory bus width 128bit 384 Bit
    Memory clock speed 1800 MHz
    Memory bandwidth 288 GB/s
    Shared memory - -
    DirectX 12 API
    Shader Model 5.1 5.1
    OpenGL 4.5 4.6
    OpenCL 1.1 1.2
    Vulkan 1.1.126 +
    CUDA +
    Monero / XMR (CryptoNight) 0.5 kh/s
    FreeSync +
    CUDA cores 384
    Bus support PCI Express 2.0, PCI Express 3.0 PCIe 3.0
    HDMI + +
    HDCP +
    Maximum VGA resolution Up to 2048x1536
    3D Blu-Ray +
    Bitcoin / BTC (SHA256) 19 Mh/s 494 Mh/s
    Laptop size medium sized
    Optimus +
    Eyefinity +
    HD3D +
    TrueAudio +
    Design reference
    DisplayPort support +
    CrossFire +
    DDMA audio +
    Decred / DCR (Decred) 1.07 Gh/s
    Ethereum / ETH (DaggerHashimoto) 14.42 Mh/s
    Zcash / ZEC (Equihash) 285 Sol/s
    AppAcceleration +
    LiquidVR +
    TressFX +
    UVD +
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