Radeon R9 390X vs Radeon R9 M390X

In this comparison between Radeon R9 390X and Radeon R9 M390X 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 R9 390X will be the best choice, for others Radeon R9 M390X will be their preference. Study the comparison tables below and make your choice.

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:

Main Specs

  Radeon R9 390X Radeon R9 M390X
Power consumption (TDP) 275 Watt 100 Watt
Interface PCIe 3.0 x16 PCIe 3.0 x16
Supplementary power connectors 1 x 6-pin, 1 x 8-pin None
Memory type GDDR5 GDDR5
Maximum RAM amount 4 GB
Display Connectors 2x DVI, 1x HDMI, 1x DisplayPort No outputs
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  • Radeon R9 390X has 175% more power consumption, than Radeon R9 M390X.
  • Both video cards are using PCIe 3.0 x16 interface connection to a motherboard.
  • Radeon R9 390X is used in Desktops, and Radeon R9 M390X - in Laptops.
  • Radeon R9 390X is build with GCN architecture, and Radeon R9 M390X - with GCN 3.
  • Radeon R9 390X and Radeon R9 M390X are manufactured by 28 nm process technology.

Game benchmarks

high / 1080p 50−55 21−24
ultra / 1080p 30−35 12−14
QHD / 1440p 24−27 8−9
4K / 2160p 14−16 5−6
low / 720p 75−80 40−45
medium / 1080p 55−60 27−30
The average gaming FPS of Radeon R9 390X in Assassin's Creed Odyssey is 115% more, than Radeon R9 M390X.

Full Specs

  Radeon R9 390X Radeon R9 M390X
Architecture GCN GCN 3
Code name Grenada XT Amethyst (XT) / Tonga
Type Desktop Laptop
Release date 16 June 2015 9 June 2015
Pipelines 2816 2048
Core clock speed 723 MHz
Boost Clock 1050 MHz
Transistor count 6,200 million 5,000 million
Manufacturing process technology 28 nm 28 nm
Texture fill rate 184.8 92.54
Floating-point performance 5,914 gflops 2,961 gflops
Length 275 mm
Memory bus width 512 Bit 256 Bit
Memory clock speed 1050 MHz
Memory bandwidth 384 GB/s 160.0 GB/s
Shared memory - -
Shader Model 6.3 6.3
OpenGL 4.6 4.4
OpenCL 2.0 Not Listed
Vulkan + +
FreeSync + +
Bus support PCIe 3.0 PCIe 3.0
HDMI +
Bitcoin / BTC (SHA256) 684 Mh/s
Laptop size large
Eyefinity + +
HD3D +
PowerTune + +
DualGraphics +
TrueAudio +
ZeroCore +
Switchable graphics +
Mantle + +
Design reference
Bridgeless CrossFire +
Number of Eyefinity displays 6
DisplayPort support +
CrossFire +
VCE +
DDMA audio +
Ethereum / ETH (DaggerHashimoto) 27.5 Mh/s
High bandwidth memory (HBM) -
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