Radeon R9 280X vs Radeon R9 M485X

In this comparison between Radeon R9 280X and Radeon R9 M485X 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 280X will be the best choice, for others Radeon R9 M485X will be their preference. Study the comparison tables below and make your choice.

Radeon R9 M485X is a Laptop Graphics Card

Note: Radeon R9 M485X 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 M485X here:

Main Specs

  Radeon R9 280X Radeon R9 M485X
Power consumption (TDP) 250 Watt 250 Watt
Interface PCIe 3.0 x16 MXM-B (3.0)
Supplementary power connectors 1 x 6-pin + 1 x 8-pin None
Memory type GDDR5 GDDR5
Maximum RAM amount 3 GB 8 GB MB
Display Connectors 2x DVI, 1x HDMI, 1x DisplayPort No outputs
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  • Both graphics cards have the same power consumption of 250 Watt.
  • Radeon R9 280X is connected by PCIe 3.0 x16, and Radeon R9 M485X uses MXM-B (3.0) interface.
  • Radeon R9 M485X has 5 GB more memory, than Radeon R9 280X.
  • Radeon R9 280X is used in Desktops, and Radeon R9 M485X - in Laptops.
  • Radeon R9 280X is build with GCN architecture, and Radeon R9 M485X - with GCN 3.
  • Radeon R9 280X and Radeon R9 M485X are manufactured by 28 nm process technology.

Game benchmarks

high / 1080p 35−40 24−27
ultra / 1080p 21−24 14−16
QHD / 1440p 16−18 10−11
4K / 2160p 10−11 6−7
low / 720p 60−65 45−50
medium / 1080p 40−45 30−35
The average gaming FPS of Radeon R9 280X in Assassin's Creed Odyssey is 45% more, than Radeon R9 M485X.

Full Specs

  Radeon R9 280X Radeon R9 M485X
Architecture GCN GCN 3
Code name Thaiti XTL Amethyst
Type Desktop Laptop
Release date 8 October 2013 14 May 2016
Pipelines 2048 2048
Core clock speed 723 MHz
Boost Clock 1000 MHz
Transistor count 4,313 million 5,000 million
Manufacturing process technology 28 nm 28 nm
Texture fill rate 128.0 92.54
Floating-point performance 4,096 gflops 2,961 gflops
Length 275 mm
Memory bus width 384 Bit 256 Bit
Memory clock speed 5000 MHz
Memory bandwidth 288 GB/s 160.0 GB/s
Shared memory - -
DirectX 12 (12_0)
Shader Model 5.1 6.3
OpenGL 4.6 4.6
OpenCL 1.2 2.0
Vulkan + 1.2.131
Monero / XMR (CryptoNight) 0.5 kh/s
FreeSync +
Bus support PCIe 3.0
HDMI +
Bitcoin / BTC (SHA256) 494 Mh/s
Laptop size large
Eyefinity +
HD3D +
TrueAudio +
Design reference
DisplayPort support +
CrossFire +
DDMA audio +
Decred / DCR (Decred) 1.07 Gh/s
Ethereum / ETH (DaggerHashimoto) 14.42 Mh/s
Zcash / ZEC (Equihash) 285 Sol/s
AppAcceleration +
LiquidVR +
TressFX +
UVD +
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