Radeon R9 M280X vs Radeon RX 640

When comparing Radeon R9 M280X and Radeon RX 640, 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 M280X and Radeon RX 640 is the price. Does the additional cost justify the performance hit? Our comparison should help you make the right decision.

Radeon R9 M280X and Radeon RX 640 are Laptop Graphics Cards

Note: Radeon R9 M280X and Radeon RX 640 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 R9 M280X or Radeon RX 640 here:

Main Specs

  Radeon R9 M280X Radeon RX 640
Power consumption (TDP) 50 Watt
Interface PCIe 3.0 x16 PCIe 3.0 x8
Supplementary power connectors None
Memory type Not Listed GDDR5
Maximum RAM amount 4 GB
Display Connectors No outputs 1x DVI, 1x HDMI, 1x DisplayPort
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  • Radeon R9 M280X is connected by PCIe 3.0 x16, and Radeon RX 640 uses PCIe 3.0 x8 interface.
  • Both cards are used in Laptops.
  • Radeon R9 M280X is build with GCN architecture, and Radeon RX 640 - with Polaris.
  • Core clock speed of Radeon RX 640 is 318 MHz higher, than Radeon R9 M280X.
  • Radeon R9 M280X is manufactured by 28 nm process technology, and Radeon RX 640 - by 14 nm process technology.

Game benchmarks

high / 1080p 2−3 5−6
ultra / 1080p 1−2 3−4
QHD / 1440p 0−1 2−3
low / 720p 14−16 16−18
medium / 1080p 4−5 7−8
The average gaming FPS of Radeon RX 640 in Assassin's Creed Odyssey is 60% more, than Radeon R9 M280X.

Full Specs

  Radeon R9 M280X Radeon RX 640
Architecture GCN Polaris
Code name Saturn XT Polaris 12
Type Laptop Laptop
Release date 1 February 2015 12 August 2019
Pipelines 896 640
Core clock speed 900 MHz 1218 MHz
Boost Clock 1218 MHz
Transistor count 2,080 million 2,200 million
Manufacturing process technology 28 nm 14 nm
Texture fill rate 61.60 38.98
Floating-point performance 1,792 gflops
Memory bus width 64 Bit
Memory clock speed 6000 MHz
Memory bandwidth 96 GB/s 112.0 GB/s
Shared memory - -
DirectX 12 (12_0)
Shader Model 6.3 6.4
OpenGL 4.4 4.6
OpenCL Not Listed 2.0
Vulkan 1.2.131
FreeSync + +
Bus support Not Listed
Laptop size large large
HD3D +
PowerTune +
DualGraphics +
ZeroCore +
Switchable graphics +
Mantle +
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