Radeon HD 7990 vs Radeon R9 M280X

When comparing Radeon HD 7990 and Radeon R9 M280X, 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 HD 7990 and Radeon R9 M280X is the price. Does the additional cost justify the performance hit? Our comparison should help you make the right decision.

Radeon R9 M280X is a Laptop Graphics Card

Note: Radeon R9 M280X 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 M280X here:

Main Specs

  Radeon HD 7990 Radeon R9 M280X
Power consumption (TDP) 375 Watt
Interface PCIe 3.0 x16 PCIe 3.0 x16
Supplementary power connectors 2x 8-pin
Memory type GDDR5 Not Listed
Maximum RAM amount 3 GB
Display Connectors 1x DVI, 4x mini-DisplayPort No outputs
  Check Price Check Price
  • Both video cards are using PCIe 3.0 x16 interface connection to a motherboard.
  • Radeon HD 7990 is used in Desktops, and Radeon R9 M280X - in Laptops.
  • Radeon HD 7990 is build with GCN 1.0 architecture, and Radeon R9 M280X - with GCN.
  • Core clock speed of Radeon HD 7990 is 50 MHz higher, than Radeon R9 M280X.
  • Radeon HD 7990 and Radeon R9 M280X are manufactured by 28 nm process technology.

Game benchmarks

high / 1080p 35−40 2−3
ultra / 1080p 21−24 1−2
QHD / 1440p 16−18 0−1
4K / 2160p 10−11
low / 720p 60−65 14−16
medium / 1080p 40−45 4−5
The average gaming FPS of Radeon HD 7990 in Assassin's Creed Odyssey is 720% more, than Radeon R9 M280X.

Full Specs

  Radeon HD 7990 Radeon R9 M280X
Architecture GCN 1.0 GCN
Code name Malta Saturn XT
Type Desktop Laptop
Release date 24 April 2013 1 February 2015
Pipelines 2048 896
Core clock speed 950 MHz 900 MHz
Boost Clock 1000 MHz
Transistor count 4,313 million 2,080 million
Manufacturing process technology 28 nm 28 nm
Texture fill rate 128.0 61.60
Floating-point performance 2x 4,096 gflops 1,792 gflops
Length 307 mm
Memory bus width 384 Bit
Memory clock speed 6000 MHz
Memory bandwidth 288.0 GB/s 96 GB/s
Shared memory -
DirectX 12 (11_1)
Shader Model 5.1 6.3
OpenGL 4.6 4.4
OpenCL 1.2 Not Listed
Vulkan 1.2.131
FreeSync +
Bus support Not Listed
Bitcoin / BTC (SHA256) 459 Mh/s
Laptop size large
HD3D +
PowerTune +
DualGraphics +
ZeroCore +
Switchable graphics +
Mantle +
Ethereum / ETH (DaggerHashimoto) 44 Mh/s
  Check Price Check Price