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    Radeon HD 6990M vs Radeon R7 M340

    When comparing Radeon HD 6990M and Radeon R7 M340, we look primarily at benchmarks and game tests. But it is not only about the numbers. Often you can find third-party models with higher clock speeds, better cooling, or a customizable RGB lighting. Not all of them will have all the features you need. Another thing to consider is the port selection. Most graphics cards have at least one DisplayPort and HDMI interface, but some monitors require DVI. Before you buy, check the TDP of the graphics card - this characteristic will help you estimate the consumption of the graphics card. You may even have to upgrade your PSU to meet its requirements. An important factor when choosing between Radeon HD 6990M and Radeon R7 M340 is the price. Does the additional cost justify the performance hit? Our comparison should help you make the right decision.
    Radeon HD 6990M Check Price
    Radeon R7 M340 Check Price

    Radeon HD 6990M and Radeon R7 M340 are Laptop Graphics Cards

    Note: Radeon HD 6990M and Radeon R7 M340 are only used in laptop graphics. They have 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 HD 6990M or Radeon R7 M340 here:

    Radeon HD 6990M Laptops
    Radeon R7 M340 Laptops

    Main Specs

      Radeon HD 6990M Radeon R7 M340
    Power consumption (TDP) 100 Watt
    Interface MXM-B (3.0) PCIe 3.0 x8
    Supplementary power connectors None None
    Memory type GDDR5 DDR3
    Maximum RAM amount 2 GB 4 GB
    Display Connectors No outputs No outputs
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    • Radeon HD 6990M is connected by MXM-B (3.0), and Radeon R7 M340 uses PCIe 3.0 x8 interface.
    • Radeon R7 M340 has 2 GB more memory, than Radeon HD 6990M.
    • Both cards are used in Laptops.
    • Radeon HD 6990M is build with Terascale 2 architecture, and Radeon R7 M340 - with GCN.
    • Core clock speed of Radeon R7 M340 is 306 MHz higher, than Radeon HD 6990M.
    • Radeon HD 6990M is manufactured by 40 nm process technology, and Radeon R7 M340 - by 28 nm process technology.
    • Memory clock speed of Radeon R7 M340 is 100 MHz higher, than Radeon HD 6990M.

    Game benchmarks

    high / 1080p 14−16 0−1
    ultra / 1080p 8−9 −
    QHD / 1440p 3−4 0−1
    low / 720p 30−33 1−2
    medium / 1080p 16−18 0−1
    The average gaming FPS of Radeon HD 6990M in Assassin's Creed Odyssey is 3000% more, than Radeon R7 M340.

    Full Specs

      Radeon HD 6990M Radeon R7 M340
    Architecture Terascale 2 GCN
    Code name Blackcomb XTX Meso Pro DDR3
    Type Laptop Laptop
    Release date 12 July 2011 16 June 2015
    Pipelines 1120 320
    Core clock speed 715 MHz 1021 MHz
    Boost Clock 1021 MHz
    Transistor count 1,700 million 950 million
    Manufacturing process technology 40 nm 28 nm
    Texture fill rate 40.04 17.16
    Floating-point performance 1,601.6 gflops 549.1 gflops
    Memory bus width 256 Bit 128 Bit
    Memory clock speed 900 MHz 1000 MHz
    Memory bandwidth 115.2 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) 74 Mh/s
    Laptop size large
    Eyefinity +
    HD3D +
    PowerTune +
    DualGraphics +
    ZeroCore +
    Switchable graphics +
    Mantle +
    Compute units 6
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