Radeon R7 M270DX vs Radeon R9 M390

If you are going to buy a new graphics card and are choosing between Radeon R7 M270DX and Radeon R9 M390, there are a couple of things to consider. Cards with more VRAM in general perform better and allow you to play on higher graphics settings. Size also makes a difference. A model with a large heatsink can occupy up to three expansion slots on a motherboard. Be sure you have enough room in your PC case. When comparing GPUs with different architectures, more processing cores and even higher TFLOPS will not always translate to better performance. To help you decide which GPU you need, we have measured frame rates in a number of popular games. For more on how the Radeon R7 M270DX stacks up against Radeon R9 M390, check out specs charts below.

Radeon R9 M390 is a Laptop Graphics Card

Note: Radeon R9 M390 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 M390 here:

Main Specs

  Radeon R7 M270DX Radeon R9 M390
Interface IGP
Memory type System Shared GDDR5
Maximum RAM amount 2 GB
Display Connectors No outputs
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  • Radeon R7 M270DX is used in Desktops, and Radeon R9 M390 - in Laptops.
  • Radeon R7 M270DX is build with GCN 3.0 architecture, and Radeon R9 M390 - with GCN.
  • Radeon R7 M270DX and Radeon R9 M390 are manufactured by 28 nm process technology.

Game benchmarks

high / 1080p 2−3 18−20
ultra / 1080p 0−1 10−11
QHD / 1440p 0−1 5−6
4K / 2160p 4−5
low / 720p 12−14 35−40
medium / 1080p 3−4 21−24
The average gaming FPS of Radeon R9 M390 in Assassin's Creed Odyssey is 333% more, than Radeon R7 M270DX.

Full Specs

  Radeon R7 M270DX Radeon R9 M390
Architecture GCN 3.0 GCN
Code name Topaz Pitcairn
Type Desktop Laptop
Release date 11 June 2014 9 June 2015
Pipelines 384 1024
Core clock speed 900 MHz
Boost Clock 940 MHz
Transistor count 1,550 million 5000 Million
Manufacturing process technology 28 nm 28 nm
Texture fill rate 22.56
Memory bus width 256 Bit
Shared memory -
DirectX 12 (12_0)
Shader Model 6.3
OpenGL 4.6 4.4
OpenCL 2.0 Not Listed
Vulkan 1.2.131
FreeSync +
Bus support PCIe 3.0
Bitcoin / BTC (SHA256) 242 Mh/s
Laptop size large
Eyefinity +
HD3D +
PowerTune +
DualGraphics +
ZeroCore +
Switchable graphics +
Mantle +
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