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    Radeon R9 M390X vs Radeon Sky 500

    When comparing Radeon R9 M390X and Radeon Sky 500, 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 R9 M390X and Radeon Sky 500 is the price. Does the additional cost justify the performance hit? Our comparison should help you make the right decision.
    Radeon R9 M390X Check Price
    Radeon Sky 500

    Radeon R9 M390X is a Laptop Graphics Card

    Note: Radeon R9 M390X 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 R9 M390X here:

    Radeon R9 M390X Laptops

    Main Specs

      Radeon R9 M390X Radeon Sky 500
    Power consumption (TDP) 100 Watt 150 Watt
    Interface PCIe 3.0 x16 PCIe 3.0 x16
    Supplementary power connectors None 1x 6-pin
    Memory type GDDR5 GDDR5
    Maximum RAM amount 4 GB 4 GB
    Display Connectors No outputs 1x DisplayPort
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    • Radeon Sky 500 has 50% more power consumption, than Radeon R9 M390X.
    • Both video cards are using PCIe 3.0 x16 interface connection to a motherboard.
    • Radeon R9 M390X and Radeon Sky 500 have maximum RAM of 4 GB.
    • Radeon R9 M390X is used in Laptops, and Radeon Sky 500 - in Desktops.
    • Radeon R9 M390X is build with GCN 3 architecture, and Radeon Sky 500 - with GCN 1.0.
    • Core clock speed of Radeon Sky 500 is 227 MHz higher, than Radeon R9 M390X.
    • Radeon R9 M390X and Radeon Sky 500 are manufactured by 28 nm process technology.

    Game benchmarks

    high / 1080p 21−24 35−40
    ultra / 1080p 12−14 21−24
    QHD / 1440p 8−9 16−18
    4K / 2160p 5−6 10−11
    low / 720p 40−45 60−65
    medium / 1080p 27−30 40−45
    The average gaming FPS of Radeon Sky 500 in Assassin's Creed Odyssey is 60% more, than Radeon R9 M390X.

    Full Specs

      Radeon R9 M390X Radeon Sky 500
    Architecture GCN 3 GCN 1.0
    Code name Amethyst (XT) / Tonga Pitcairn
    Type Laptop Desktop
    Release date 9 June 2015 27 March 2013
    Pipelines 2048 1280
    Core clock speed 723 MHz 950 MHz
    Transistor count 5,000 million 2,800 million
    Manufacturing process technology 28 nm 28 nm
    Texture fill rate 92.54 76.00
    Floating-point performance 2,961 gflops 2,432 gflops
    Length 242 mm
    Memory bus width 256 Bit 256 Bit
    Memory clock speed 4800 MHz
    Memory bandwidth 160.0 GB/s 154 GB/s
    Shared memory -
    DirectX 12 (11_1)
    Shader Model 6.3 5.1
    OpenGL 4.4 4.6
    OpenCL Not Listed 1.2
    Vulkan + 1.2.131
    FreeSync +
    Bus support PCIe 3.0 PCIe 3.0
    Laptop size large
    Eyefinity +
    HD3D +
    PowerTune +
    DualGraphics +
    ZeroCore +
    Switchable graphics +
    Mantle +
    Form factor full height / full length
    DisplayPort count 1
    Dual-link DVI support +
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