Radeon HD 4890 vs Radeon R9 M390X

When choosing between Radeon HD 4890 and Radeon R9 M390X, it is worth examining the specifications of the models in detail. Do they meet the recommended requirements of modern games and software? Storage capacity, form factor, TDP, available ports, warranty and manufacturer support are all important. For example, the size of a PC case can limit the maximum thickness and length of the card. Often, instead of the factory overclocked card and RGB backlight, it is better to choose a reference model with a more efficient GPU. And make sure that your current power supply unit has the correct connection pins (using adapters is not recommended). This GPUs compare tool is meant to help you to choose the best graphics card for your build. Let's find out the difference between Radeon HD 4890 and Radeon R9 M390X.

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 HD 4890 Radeon R9 M390X
Power consumption (TDP) 190 Watt 100 Watt
Interface PCIe 2.0 x16 PCIe 3.0 x16
Supplementary power connectors 2x 6-pin None
Memory type GDDR5 GDDR5
Maximum RAM amount 1 GB 4 GB
Display Connectors 2x DVI, 1x S-Video No outputs
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  • Radeon HD 4890 has 90% more power consumption, than Radeon R9 M390X.
  • Radeon HD 4890 is connected by PCIe 2.0 x16, and Radeon R9 M390X uses PCIe 3.0 x16 interface.
  • Radeon R9 M390X has 3 GB more memory, than Radeon HD 4890.
  • Radeon HD 4890 is used in Desktops, and Radeon R9 M390X - in Laptops.
  • Radeon HD 4890 is build with TeraScale architecture, and Radeon R9 M390X - with GCN 3.
  • Core clock speed of Radeon HD 4890 is 127 MHz higher, than Radeon R9 M390X.
  • Radeon HD 4890 is manufactured by 55 nm process technology, and Radeon R9 M390X - by 28 nm process technology.

Game benchmarks

high / 1080p 7−8 21−24
ultra / 1080p 4−5 12−14
QHD / 1440p 0−1 8−9
4K / 2160p 5−6
low / 720p 16−18 40−45
medium / 1080p 8−9 27−30
The average gaming FPS of Radeon R9 M390X in Assassin's Creed Odyssey is 188% more, than Radeon HD 4890.

Full Specs

  Radeon HD 4890 Radeon R9 M390X
Architecture TeraScale GCN 3
Code name RV790 Amethyst (XT) / Tonga
Type Desktop Laptop
Release date 2 April 2009 9 June 2015
Pipelines 800 2048
Core clock speed 850 MHz 723 MHz
Transistor count 959 million 5,000 million
Manufacturing process technology 55 nm 28 nm
Texture fill rate 34.00 92.54
Floating-point performance 1,360.0 gflops 2,961 gflops
Length 241 mm
Memory bus width 256 Bit 256 Bit
Memory clock speed 3900 MHz
Memory bandwidth 124.8 GB/s 160.0 GB/s
Shared memory -
DirectX 10.1 (10_1)
Shader Model 4.1 6.3
OpenGL 3.3 4.4
OpenCL 1.1 Not Listed
Vulkan N/A +
FreeSync +
Bus support PCIe 3.0
Laptop size large
Eyefinity +
HD3D +
PowerTune +
DualGraphics +
ZeroCore +
Switchable graphics +
Mantle +
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