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    GeForce GT 640 vs GeForce GT 755M

    If you are going to buy a new graphics card and are choosing between GeForce GT 640 and GeForce GT 755M, 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 640 stacks up against GeForce GT 755M, check out specs charts below.
    GeForce GT 640 Check Price
    GeForce GT 755M Check Price

    GeForce GT 755M is a Laptop Graphics Card

    Note: GeForce GT 755M 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 755M here:

    GeForce GT 755M Laptops

    Main Specs

      GeForce GT 640 GeForce GT 755M
    Power consumption (TDP) 65 Watt 50 Watt
    Interface PCIe 3.0 x16 PCIe 3.0 x16
    Supplementary power connectors None
    Memory type DDR3 GDDR5
    Maximum RAM amount 2 GB 4 GB
    Display Connectors 1x DVI, 1x HDMI, 1x DisplayPort No outputs
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    • GeForce GT 640 has 30% more power consumption, than GeForce GT 755M.
    • Both video cards are using PCIe 3.0 x16 interface connection to a motherboard.
    • GeForce GT 755M has 2 GB more memory, than GeForce GT 640.
    • GeForce GT 640 is used in Desktops, and GeForce GT 755M - in Laptops.
    • GeForce GT 640 and GeForce GT 755M are build with Kepler architecture.
    • Core clock speed of GeForce GT 755M is 78 MHz higher, than GeForce GT 640.
    • GeForce GT 640 and GeForce GT 755M are manufactured by 28 nm process technology.
    • Memory clock speed of GeForce GT 755M is 3618 MHz higher, than GeForce GT 640.

    Game benchmarks

    high / 1080p 2−3 7−8
    ultra / 1080p 1−2 4−5
    QHD / 1440p 0−1 0−1
    low / 720p 14−16 18−20
    medium / 1080p 5−6 9−10
    The average gaming FPS of GeForce GT 755M in Assassin's Creed Odyssey is 66% more, than GeForce GT 640.

    Full Specs

      GeForce GT 640 GeForce GT 755M
    Architecture Kepler Kepler
    Code name GK107 N14P-
    Type Desktop Laptop
    Release date 5 June 2012 25 June 2013
    Pipelines 384 384
    Core clock speed 902 MHz 980 MHz
    Transistor count 1,270 million 1,270 million
    Manufacturing process technology 28 nm 28 nm
    Texture fill rate 28.86 31.36
    Floating-point performance 692.7 gflops 752.6 gflops
    Length 145 mm
    Memory bus width 128 Bit 128 Bit
    Memory clock speed 1782 MHz 5400 MHz
    Memory bandwidth 28.51 GB/s 86.4 GB/s
    Shared memory -
    DirectX 12 (11_0) 12 API
    Shader Model 5.1 5.1
    OpenGL 4.6 4.5
    OpenCL 1.2 1.1
    Vulkan 1.1.126 1.1.126
    CUDA 3.0 +
    Bus support PCI Express 3.0, PCI Express 2.0
    HDMI +
    Bitcoin / BTC (SHA256) 24 Mh/s 27 Mh/s
    Laptop size medium sized
    Standard memory configuration GDDR5
    eDP 1.2 signal support Up to 3840x2160
    LVDS signal support Up to 1920x1200
    DisplayPort Multimode (DP++) support Up to 3840x2160
    HDCP content protection +
    7.1 channel HD audio on HDMI +
    TrueHD and DTS-HD audio bitstreaming +
    H.264, VC1, MPEG2 1080p video decoder +
    Optimus +
    Blu-Ray 3D Support +
    3D Vision / 3DTV Play +
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