GeForce GTX 660 vs Mobility Radeon HD 4870 X2

In this comparison between GeForce GTX 660 and Mobility Radeon HD 4870 X2 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 GeForce GTX 660 will be the best choice, for others Mobility Radeon HD 4870 X2 will be their preference. Study the comparison tables below and make your choice.

Mobility Radeon HD 4870 X2 is a Laptop Graphics Card

Note: Mobility Radeon HD 4870 X2 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 Mobility Radeon HD 4870 X2 here:

Main Specs

  GeForce GTX 660 Mobility Radeon HD 4870 X2
Power consumption (TDP) 140 Watt
Interface PCIe 3.0 x16 PCIe 2.0 x16
Supplementary power connectors One 6-pin
Memory type GDDR5 GDDR3, GDDR5
Maximum RAM amount 2 GB 2 GB
Display Connectors 2x DVI, 1x HDMI, 1x DisplayPort No outputs
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  • GeForce GTX 660 is connected by PCIe 3.0 x16, and Mobility Radeon HD 4870 X2 uses PCIe 2.0 x16 interface.
  • GeForce GTX 660 and Mobility Radeon HD 4870 X2 have maximum RAM of 2 GB.
  • GeForce GTX 660 is used in Desktops, and Mobility Radeon HD 4870 X2 - in Laptops.
  • GeForce GTX 660 is build with Kepler architecture, and Mobility Radeon HD 4870 X2 - with Terascale 1.
  • Core clock speed of GeForce GTX 660 is 430 MHz higher, than Mobility Radeon HD 4870 X2.
  • GeForce GTX 660 is manufactured by 28 nm process technology, and Mobility Radeon HD 4870 X2 - by 55 nm process technology.
  • Memory clock speed of Mobility Radeon HD 4870 X2 is 882 MHz higher, than GeForce GTX 660.

Game benchmarks

high / 1080p 20−22 9−10
ultra / 1080p 12−14 5−6
QHD / 1440p 6−7 0−1
4K / 2160p 5−6
low / 720p 40−45 21−24
medium / 1080p 24−27 12−14
The average gaming FPS of GeForce GTX 660 in Assassin's Creed Odyssey is 108% more, than Mobility Radeon HD 4870 X2.

Full Specs

  GeForce GTX 660 Mobility Radeon HD 4870 X2
Architecture Kepler Terascale 1
Code name GK106 M98-XT
Type Desktop Laptop
Release date 6 September 2012 9 January 2009
Pipelines 960 1600
Core clock speed 980 MHz 550 MHz
Boost Clock 1033 MHz
Transistor count 2,540 million 956 million
Manufacturing process technology 28 nm 55 nm
Texture fill rate 78.4 billion/sec 22.00
Floating-point performance 1,981 gflops 2x 880.0 gflops
Length 9.5" (24.1 cm)
Memory bus width 192-bit GDDR5 256 Bit
Memory clock speed 6.0 GB/s 888 MHz
Memory bandwidth 144.2 GB/s 89.6 GB/s
Shared memory -
DirectX 12 (11_0) 10.1 (10_1)
Shader Model 5.1 4.1
OpenGL 4.3 3.3
OpenCL 1.2 1.1
Vulkan 1.1.126 N/A
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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