GeForce GTX 660 vs Radeon R9 M485X

When choosing between GeForce GTX 660 and Radeon R9 M485X, 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 GeForce GTX 660 and Radeon R9 M485X.

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

  GeForce GTX 660 Radeon R9 M485X
Power consumption (TDP) 140 Watt 250 Watt
Interface PCIe 3.0 x16 MXM-B (3.0)
Supplementary power connectors One 6-pin None
Memory type GDDR5 GDDR5
Maximum RAM amount 2 GB 8 GB MB
Display Connectors 2x DVI, 1x HDMI, 1x DisplayPort No outputs
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  • Radeon R9 M485X has 78% more power consumption, than GeForce GTX 660.
  • GeForce GTX 660 is connected by PCIe 3.0 x16, and Radeon R9 M485X uses MXM-B (3.0) interface.
  • Radeon R9 M485X has 6 GB more memory, than GeForce GTX 660.
  • GeForce GTX 660 is used in Desktops, and Radeon R9 M485X - in Laptops.
  • GeForce GTX 660 is build with Kepler architecture, and Radeon R9 M485X - with GCN 3.
  • Core clock speed of GeForce GTX 660 is 257 MHz higher, than Radeon R9 M485X.
  • GeForce GTX 660 and Radeon R9 M485X are manufactured by 28 nm process technology.
  • Memory clock speed of Radeon R9 M485X is 4994 MHz higher, than GeForce GTX 660.

Game benchmarks

high / 1080p 20−22 24−27
ultra / 1080p 12−14 14−16
QHD / 1440p 6−7 10−11
4K / 2160p 5−6 6−7
low / 720p 40−45 45−50
medium / 1080p 24−27 30−35
The average gaming FPS of Radeon R9 M485X in Assassin's Creed Odyssey is 15% more, than GeForce GTX 660.

Full Specs

  GeForce GTX 660 Radeon R9 M485X
Architecture Kepler GCN 3
Code name GK106 Amethyst
Type Desktop Laptop
Release date 6 September 2012 14 May 2016
Pipelines 960 2048
Core clock speed 980 MHz 723 MHz
Boost Clock 1033 MHz
Transistor count 2,540 million 5,000 million
Manufacturing process technology 28 nm 28 nm
Texture fill rate 78.4 billion/sec 92.54
Floating-point performance 1,981 gflops 2,961 gflops
Length 9.5" (24.1 cm)
Memory bus width 192-bit GDDR5 256 Bit
Memory clock speed 6.0 GB/s 5000 MHz
Memory bandwidth 144.2 GB/s 160.0 GB/s
Shared memory -
DirectX 12 (11_0) 12 (12_0)
Shader Model 5.1 6.3
OpenGL 4.3 4.6
OpenCL 1.2 2.0
Vulkan 1.1.126 1.2.131
CUDA +
CUDA cores 960
Bus support PCI Express 3.0
Height 4.376" (11.1 cm)
SLI options +
Multi monitor support 4 displays
HDMI +
HDCP +
Maximum VGA resolution 2048x1536
Audio input for HDMI Internal
3D Blu-Ray +
3D Gaming +
3D Vision +
Bitcoin / BTC (SHA256) 66 Mh/s
Laptop size large
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