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    Radeon HD 6790 vs Radeon R7 M340

    In this comparison between Radeon HD 6790 and Radeon R7 M340 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 Radeon HD 6790 will be the best choice, for others Radeon R7 M340 will be their preference. Study the comparison tables below and make your choice.
    Radeon HD 6790 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

      Radeon HD 6790 Radeon R7 M340
    Power consumption (TDP) 150 Watt
    Interface PCIe 2.0 x16 PCIe 3.0 x8
    Supplementary power connectors 2x 6-pin None
    Memory type GDDR5 DDR3
    Maximum RAM amount 1 GB 4 GB
    Display Connectors 2x DVI, 1x HDMI, 1x DisplayPort No outputs
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    • Radeon HD 6790 is connected by PCIe 2.0 x16, and Radeon R7 M340 uses PCIe 3.0 x8 interface.
    • Radeon R7 M340 has 3 GB more memory, than Radeon HD 6790.
    • Radeon HD 6790 is used in Desktops, and Radeon R7 M340 - in Laptops.
    • Radeon HD 6790 is build with Terascale 2 architecture, and Radeon R7 M340 - with GCN.
    • Core clock speed of Radeon R7 M340 is 181 MHz higher, than Radeon HD 6790.
    • Radeon HD 6790 is manufactured by 40 nm process technology, and Radeon R7 M340 - by 28 nm process technology.
    • Memory clock speed of Radeon HD 6790 is 50 MHz higher, than Radeon R7 M340.

    Game benchmarks

    high / 1080p 7−8 0−1
    ultra / 1080p 4−5 −
    QHD / 1440p 0−1 0−1
    low / 720p 18−20 1−2
    medium / 1080p 9−10 0−1
    The average gaming FPS of Radeon HD 6790 in Assassin's Creed Odyssey is 1800% more, than Radeon R7 M340.

    Full Specs

      Radeon HD 6790 Radeon R7 M340
    Architecture Terascale 2 GCN
    Code name Barts Meso Pro DDR3
    Type Desktop Laptop
    Release date 4 April 2011 16 June 2015
    Pipelines 800 320
    Core clock speed 840 MHz 1021 MHz
    Boost Clock 1021 MHz
    Transistor count 1,700 million 950 million
    Manufacturing process technology 40 nm 28 nm
    Texture fill rate 33.60 17.16
    Floating-point performance 1,344.0 gflops 549.1 gflops
    Length 198 mm
    Memory bus width 256 Bit 128 Bit
    Memory clock speed 1050 MHz 1000 MHz
    Memory bandwidth 134.4 GB/s 16 GB/s
    Shared memory -
    DirectX 11.2 (11_0)
    Shader Model 5.0 5.1
    OpenGL 4.4 4.4
    OpenCL 1.2 Not Listed
    Vulkan N/A +
    FreeSync +
    Bus support PCIe 3.0
    Bitcoin / BTC (SHA256) 122 Mh/s 74 Mh/s
    Eyefinity +
    HD3D +
    PowerTune +
    DualGraphics +
    ZeroCore +
    Switchable graphics +
    Mantle +
    Compute units 6
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