GeForce GTX 660M vs Radeon HD 4770

If you are going to buy a new graphics card and are choosing between GeForce GTX 660M and Radeon HD 4770, 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 4770, 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 4770
Power consumption (TDP) 50 Watt 80 Watt
Interface MXM-B (3.0) PCIe 2.0 x16
Supplementary power connectors 1x 6-pin
Memory type GDDR5 GDDR5
Maximum RAM amount 2 GB 512 MB
Display Connectors No outputs 2x DVI, 1x S-Video
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  • Radeon HD 4770 has 60% more power consumption, than GeForce GTX 660M.
  • GeForce GTX 660M is connected by MXM-B (3.0), and Radeon HD 4770 uses PCIe 2.0 x16 interface.
  • Radeon HD 4770 has 510 GB more memory, than GeForce GTX 660M.
  • GeForce GTX 660M is used in Laptops, and Radeon HD 4770 - in Desktops.
  • GeForce GTX 660M is build with Kepler architecture, and Radeon HD 4770 - with TeraScale.
  • Core clock speed of GeForce GTX 660M is 85 MHz higher, than Radeon HD 4770.
  • GeForce GTX 660M is manufactured by 28 nm process technology, and Radeon HD 4770 - by 40 nm process technology.
  • Memory clock speed of Radeon HD 4770 is 1200 MHz higher, than GeForce GTX 660M.

Game benchmarks

high / 1080p 6−7 1−2
ultra / 1080p 4−5 0−1
QHD / 1440p 0−1 0−1
low / 720p 16−18 10−12
medium / 1080p 8−9 2−3
The average gaming FPS of GeForce GTX 660M in Assassin's Creed Odyssey is 100% more, than Radeon HD 4770.

Full Specs

  GeForce GTX 660M Radeon HD 4770
Architecture Kepler TeraScale
Code name N13E-GE RV740
Type Laptop Desktop
Release date 22 March 2012 28 April 2009
Pipelines 384 640
Core clock speed 835 MHz 750 MHz
Boost Clock 950 MHz
Transistor count 1,270 million 826 million
Manufacturing process technology 28 nm 40 nm
Texture fill rate 30.4 billion/sec 24.00
Floating-point performance 729.6 gflops 960.0 gflops
Length 203 mm
Memory bus width 128bit 128 Bit
Memory clock speed 2000 MHz 3200 MHz
Memory bandwidth 64.0 GB/s 51.2 GB/s
Shared memory -
DirectX 12 API 10.1 (10_1)
Shader Model 5.1 4.1
OpenGL 4.5 3.3
OpenCL 1.1 1.1
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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