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    GeForce GT 640 vs Radeon R7 M340

    If you are going to buy a new graphics card and are choosing between GeForce GT 640 and Radeon R7 M340, 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 Radeon R7 M340, check out specs charts below.
    GeForce GT 640 Check Price
    Radeon R7 M340 Check Price

    Radeon R7 M340 is a Laptop Graphics Card

    Note: Radeon R7 M340 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 Radeon R7 M340 here:

    Radeon R7 M340 Laptops

    Main Specs

      GeForce GT 640 Radeon R7 M340
    Power consumption (TDP) 65 Watt
    Interface PCIe 3.0 x16 PCIe 3.0 x8
    Supplementary power connectors None None
    Memory type DDR3 DDR3
    Maximum RAM amount 2 GB 4 GB
    Display Connectors 1x DVI, 1x HDMI, 1x DisplayPort No outputs
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    • GeForce GT 640 is connected by PCIe 3.0 x16, and Radeon R7 M340 uses PCIe 3.0 x8 interface.
    • Radeon R7 M340 has 2 GB more memory, than GeForce GT 640.
    • GeForce GT 640 is used in Desktops, and Radeon R7 M340 - in Laptops.
    • GeForce GT 640 is build with Kepler architecture, and Radeon R7 M340 - with GCN.
    • Core clock speed of Radeon R7 M340 is 119 MHz higher, than GeForce GT 640.
    • GeForce GT 640 and Radeon R7 M340 are manufactured by 28 nm process technology.
    • Memory clock speed of GeForce GT 640 is 782 MHz higher, than Radeon R7 M340.

    Game benchmarks

    high / 1080p 2−3 0−1
    ultra / 1080p 1−2 −
    QHD / 1440p 0−1 0−1
    low / 720p 14−16 1−2
    medium / 1080p 5−6 0−1
    The average gaming FPS of GeForce GT 640 in Assassin's Creed Odyssey is 1400% more, than Radeon R7 M340.

    Full Specs

      GeForce GT 640 Radeon R7 M340
    Architecture Kepler GCN
    Code name GK107 Meso Pro DDR3
    Type Desktop Laptop
    Release date 5 June 2012 16 June 2015
    Pipelines 384 320
    Core clock speed 902 MHz 1021 MHz
    Boost Clock 1021 MHz
    Transistor count 1,270 million 950 million
    Manufacturing process technology 28 nm 28 nm
    Texture fill rate 28.86 17.16
    Floating-point performance 692.7 gflops 549.1 gflops
    Length 145 mm
    Memory bus width 128 Bit 128 Bit
    Memory clock speed 1782 MHz 1000 MHz
    Memory bandwidth 28.51 GB/s 16 GB/s
    Shared memory -
    DirectX 12 (11_0)
    Shader Model 5.1 5.1
    OpenGL 4.6 4.4
    OpenCL 1.2 Not Listed
    Vulkan 1.1.126 +
    CUDA 3.0
    FreeSync +
    Bus support PCIe 3.0
    Bitcoin / BTC (SHA256) 24 Mh/s 74 Mh/s
    Eyefinity +
    HD3D +
    PowerTune +
    DualGraphics +
    ZeroCore +
    Switchable graphics +
    Mantle +
    Compute units 6
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