GeForce GTX 660M vs Radeon HD 5850

If you are going to buy a new graphics card and are choosing between GeForce GTX 660M and Radeon HD 5850, there are a couple of things to consider. Cards with more VRAM in general perform better and allow you to play on higher graphics settings. Size also makes a difference. A model with a large heatsink can occupy up to three expansion slots on a motherboard. Be sure you have enough room in your PC case. When comparing GPUs with different architectures, more processing cores and even higher TFLOPS will not always translate to better performance. To help you decide which GPU you need, we have measured frame rates in a number of popular games. For more on how the GeForce GTX 660M stacks up against Radeon HD 5850, check out specs charts below.

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 5850
Power consumption (TDP) 50 Watt 151 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 5850 has 202% more power consumption, than GeForce GTX 660M.
  • GeForce GTX 660M is connected by MXM-B (3.0), and Radeon HD 5850 uses PCIe 2.0 x16 interface.
  • GeForce GTX 660M has 1 GB more memory, than Radeon HD 5850.
  • GeForce GTX 660M is used in Laptops, and Radeon HD 5850 - in Desktops.
  • GeForce GTX 660M is build with Kepler architecture, and Radeon HD 5850 - with Terascale 2.
  • Core clock speed of GeForce GTX 660M is 110 MHz higher, than Radeon HD 5850.
  • GeForce GTX 660M is manufactured by 28 nm process technology, and Radeon HD 5850 - by 40 nm process technology.
  • Memory clock speed of GeForce GTX 660M and Radeon HD 5850 is 2000 MHz.

Game benchmarks

high / 1080p 6−7 9−10
ultra / 1080p 4−5 5−6
QHD / 1440p 0−1 0−1
low / 720p 16−18 21−24
medium / 1080p 8−9 12−14
The average gaming FPS of Radeon HD 5850 in Assassin's Creed Odyssey is 33% more, than GeForce GTX 660M.

Full Specs

  GeForce GTX 660M Radeon HD 5850
Architecture Kepler Terascale 2
Code name N13E-GE Cypress
Type Laptop Desktop
Release date 22 March 2012 30 September 2009
Pipelines 384 1440
Core clock speed 835 MHz 725 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 52.20
Floating-point performance 729.6 gflops 2,088.0 gflops
Length 241 mm
Memory bus width 128bit 256 Bit
Memory clock speed 2000 MHz 2000 MHz
Memory bandwidth 64.0 GB/s 128.0 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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