GeForce GTX 660M vs Radeon HD 5870

Find out if it is worth upgrading your current GPU setup by comparing GeForce GTX 660M and Radeon HD 5870. Here you can take a closer look at graphics cards specs, such as core clock speed, memory type and size, display connectors, etc. The price, overall benchmark and gaming performances are usually defining factors when it comes to choosing between GeForce GTX 660M and Radeon HD 5870. Make sure that the graphics card has compatible dimensions and will properly fit in your new or current computer case. Also these graphics cards may have different system power recommendations, so take that into consideration and upgrade your PSU if necessary.

GeForce GTX 660M is a Laptop Graphics Card

Note: GeForce GTX 660M 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 GeForce GTX 660M here:

Main Specs

  GeForce GTX 660M Radeon HD 5870
Power consumption (TDP) 50 Watt 188 Watt
Interface MXM-B (3.0) PCIe 2.0 x16
Supplementary power connectors 2x 6-pin
Memory type GDDR5 GDDR5
Maximum RAM amount 2 GB 1 GB
Display Connectors No outputs 2x DVI, 1x HDMI, 1x DisplayPort
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  • Radeon HD 5870 has 276% more power consumption, than GeForce GTX 660M.
  • GeForce GTX 660M is connected by MXM-B (3.0), and Radeon HD 5870 uses PCIe 2.0 x16 interface.
  • GeForce GTX 660M has 1 GB more memory, than Radeon HD 5870.
  • GeForce GTX 660M is used in Laptops, and Radeon HD 5870 - in Desktops.
  • GeForce GTX 660M is build with Kepler architecture, and Radeon HD 5870 - with TeraScale 2.
  • Core clock speed of Radeon HD 5870 is 15 MHz higher, than GeForce GTX 660M.
  • GeForce GTX 660M is manufactured by 28 nm process technology, and Radeon HD 5870 - by 40 nm process technology.
  • Memory clock speed of Radeon HD 5870 is 2800 MHz higher, than GeForce GTX 660M.

Game benchmarks

high / 1080p 6−7 10−12
ultra / 1080p 4−5 6−7
QHD / 1440p 0−1 1−2
low / 720p 16−18 24−27
medium / 1080p 8−9 14−16
The average gaming FPS of Radeon HD 5870 in Assassin's Creed Odyssey is 55% more, than GeForce GTX 660M.

Full Specs

  GeForce GTX 660M Radeon HD 5870
Architecture Kepler TeraScale 2
Code name N13E-GE Cypress
Type Laptop Desktop
Release date 22 March 2012 23 September 2009
Pipelines 384 1600
Core clock speed 835 MHz 850 MHz
Boost Clock 950 MHz
Transistor count 1,270 million 2,154 million
Manufacturing process technology 28 nm 40 nm
Texture fill rate 30.4 billion/sec 68.00
Floating-point performance 729.6 gflops 2,720.0 gflops
Length 282 mm
Memory bus width 128bit 256 Bit
Memory clock speed 2000 MHz 4800 MHz
Memory bandwidth 64.0 GB/s 153.6 GB/s
Shared memory -
DirectX 12 API 11.2 (11_0)
Shader Model 5.1 5.0
OpenGL 4.5 4.4
OpenCL 1.1 1.2
Vulkan 1.1.126 N/A
CUDA +
CUDA cores 384
Bus support PCI Express 2.0, PCI Express 3.0
SLI options +
HDMI +
HDCP +
Maximum VGA resolution Up to 2048x1536
Bitcoin / BTC (SHA256) 36 Mh/s
Laptop size large
Optimus +
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