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    GeForce GT 645M vs Radeon HD 7850

    If you are going to buy a new graphics card and are choosing between GeForce GT 645M and Radeon HD 7850, 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 GT 645M stacks up against Radeon HD 7850, check out specs charts below.
    GeForce GT 645M Check Price
    Radeon HD 7850 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 HD 7850
    Power consumption (TDP) 32 Watt 225 Watt
    Interface PCIe 3.0 x16 PCIe 3.0 x16
    Supplementary power connectors 1x 6-pin
    Memory type DDR3\GDDR5 GDDR5
    Maximum RAM amount 2 GB 2 GB
    Display Connectors No outputs 1x DVI, 1x HDMI, 2x mini-DisplayPort
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    • Radeon HD 7850 has 603% more power consumption, than GeForce GT 645M.
    • Both video cards are using PCIe 3.0 x16 interface connection to a motherboard.
    • GeForce GT 645M and Radeon HD 7850 have maximum RAM of 2 GB.
    • GeForce GT 645M is used in Laptops, and Radeon HD 7850 - in Desktops.
    • GeForce GT 645M is build with Kepler architecture, and Radeon HD 7850 - with GCN 1.0.
    • GeForce GT 645M and Radeon HD 7850 are manufactured by 28 nm process technology.
    • Memory clock speed of GeForce GT 645M is 600 MHz higher, than Radeon HD 7850.

    Game benchmarks

    high / 1080p 1−2 18−20
    ultra / 1080p 0−1 10−12
    QHD / 1440p 0−1 5−6
    4K / 2160p − 4−5
    low / 720p 12−14 35−40
    medium / 1080p 2−3 24−27
    The average gaming FPS of Radeon HD 7850 in Assassin's Creed Odyssey is 440% more, than GeForce GT 645M.

    Full Specs

      GeForce GT 645M Radeon HD 7850
    Architecture Kepler GCN 1.0
    Code name N13P-GS Pitcairn
    Type Laptop Desktop
    Release date 22 March 2012 5 March 2012
    Pipelines 384 1024
    Boost Clock 1000 MHz
    Transistor count 1,270 million 2,800 million
    Manufacturing process technology 28 nm 28 nm
    Texture fill rate 22.7 billion/sec 55.04
    Floating-point performance 544.5 gflops 1,761 gflops
    Length 210 mm
    Memory bus width 128bit 256 Bit
    Memory clock speed 1800 MHz 1200 MHz
    Memory bandwidth 153.6 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 2.1 x16
    HDMI + +
    HDCP +
    Maximum VGA resolution Up to 2048x1536
    3D Blu-Ray +
    Bitcoin / BTC (SHA256) 19 Mh/s 249 Mh/s
    Laptop size medium sized
    Optimus +
    Eyefinity +
    Design reference
    CrossFire +
    Ethereum / ETH (DaggerHashimoto) 12.5 Mh/s
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