Subscribe to our YouTube channel ×

    GeForce GT 645M vs Radeon R9 280

    In this comparison between GeForce GT 645M and Radeon R9 280 you will find out which graphics card performs better in today's games. Bear in mind that third-party versions may have more efficient cooling and higher clock speeds. This will increase cards' performance, though not by much. In addition to raw power you should also take into account the dimensions. Thicker models simply will not fit into a small mini-ITX case. The resolution of your monitor also affects the choice, since 4K gameplay requires a more powerful GPU. And don't overspend on the graphics card. Other parts of your build may also need to be upgraded, save some money for the CPU or power supply. For some people GeForce GT 645M will be the best choice, for others Radeon R9 280 will be their preference. Study the comparison tables below and make your choice.
    GeForce GT 645M Check Price
    Radeon R9 280 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 280
    Power consumption (TDP) 32 Watt 200 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, 2x mini-DisplayPort
      Check Price Check Price
    • Radeon R9 280 has 525% more power consumption, than GeForce GT 645M.
    • Both video cards are using PCIe 3.0 x16 interface connection to a motherboard.
    • Radeon R9 280 has 1 GB more memory, than GeForce GT 645M.
    • GeForce GT 645M is used in Laptops, and Radeon R9 280 - in Desktops.
    • GeForce GT 645M is build with Kepler architecture, and Radeon R9 280 - with GCN 1.0.
    • GeForce GT 645M and Radeon R9 280 are manufactured by 28 nm process technology.
    • Memory clock speed of GeForce GT 645M is 550 MHz higher, than Radeon R9 280.

    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 280 in Assassin's Creed Odyssey is 840% more, than GeForce GT 645M.

    Full Specs

      GeForce GT 645M Radeon R9 280
    Architecture Kepler GCN 1.0
    Code name N13P-GS Tahiti
    Type Laptop Desktop
    Release date 22 March 2012 4 March 2014
    Pipelines 384 1792
    Boost Clock 933 MHz
    Transistor count 1,270 million 4,313 million
    Manufacturing process technology 28 nm 28 nm
    Texture fill rate 22.7 billion/sec 104.5
    Floating-point performance 544.5 gflops 3,344 gflops
    Length 275 mm
    Memory bus width 128bit 384 Bit
    Memory clock speed 1800 MHz 1250 MHz
    Memory bandwidth 240 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 +
    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 408 Mh/s
    Laptop size medium sized
    Optimus +
    Eyefinity +
    HD3D +
    TrueAudio +
    Design reference
    CrossFire +
    DDMA audio +
    Ethereum / ETH (DaggerHashimoto) 21.5 Mh/s
    LiquidVR +
    TressFX +
    UVD +
      Check Price Check Price

    Similar compares