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    Radeon HD 6870 vs Radeon R7 M340

    When comparing Radeon HD 6870 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 6870 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 6870 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 6870 Radeon R7 M340
    Power consumption (TDP) 151 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, 2x mini-DisplayPort No outputs
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    • Radeon HD 6870 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 6870.
    • Radeon HD 6870 is used in Desktops, and Radeon R7 M340 - in Laptops.
    • Radeon HD 6870 is build with Terascale 2 architecture, and Radeon R7 M340 - with GCN.
    • Radeon HD 6870 is manufactured by 40 nm process technology, and Radeon R7 M340 - by 28 nm process technology.
    • Memory clock speed of Radeon HD 6870 is 50 MHz higher, than Radeon R7 M340.

    Game benchmarks

    high / 1080p 10−12 0−1
    ultra / 1080p 6−7 −
    QHD / 1440p 1−2 0−1
    low / 720p 24−27 1−2
    medium / 1080p 12−14 0−1
    The average gaming FPS of Radeon HD 6870 in Assassin's Creed Odyssey is 2400% more, than Radeon R7 M340.

    Full Specs

      Radeon HD 6870 Radeon R7 M340
    Architecture Terascale 2 GCN
    Code name RV940 Barts Meso Pro DDR3
    Type Desktop Laptop
    Release date 22 October 2010 16 June 2015
    Pipelines 1120 320
    Core clock speed 1021 MHz
    Boost Clock 900 MHz 1021 MHz
    Transistor count 1,700 million 950 million
    Manufacturing process technology 40 nm 28 nm
    Texture fill rate 50.40 17.16
    Floating-point performance 2,016.0 gflops 549.1 gflops
    Length 220 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 - -
    Shader Model 5.0 5.1
    OpenGL 4.4 4.4
    OpenCL 1.2 Not Listed
    Vulkan +
    FreeSync +
    Bus support PCIe 2.0 x16 PCIe 3.0
    HDMI +
    Bitcoin / BTC (SHA256) 213 Mh/s 74 Mh/s
    Eyefinity + +
    HD3D +
    PowerTune +
    DualGraphics +
    ZeroCore +
    Switchable graphics +
    Mantle +
    Design reference
    CrossFire +
    Compute units 6
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