GeForce GTX 660 vs Radeon HD 6550A

If you are going to buy a new graphics card and are choosing between GeForce GTX 660 and Radeon HD 6550A, 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 660 stacks up against Radeon HD 6550A, check out specs charts below.

Main Specs

  GeForce GTX 660 Radeon HD 6550A
Power consumption (TDP) 140 Watt 35 Watt
Interface PCIe 3.0 x16 MXM-A (3.0)
Supplementary power connectors One 6-pin
Memory type GDDR5 GDDR3
Maximum RAM amount 2 GB 2 GB
Display Connectors 2x DVI, 1x HDMI, 1x DisplayPort No outputs
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  • GeForce GTX 660 has 300% more power consumption, than Radeon HD 6550A.
  • GeForce GTX 660 is connected by PCIe 3.0 x16, and Radeon HD 6550A uses MXM-A (3.0) interface.
  • GeForce GTX 660 and Radeon HD 6550A have maximum RAM of 2 GB.
  • Both cards are used in Desktops.
  • GeForce GTX 660 is build with Kepler architecture, and Radeon HD 6550A - with TeraScale 2.
  • Core clock speed of GeForce GTX 660 is 430 MHz higher, than Radeon HD 6550A.
  • GeForce GTX 660 is manufactured by 28 nm process technology, and Radeon HD 6550A - by 40 nm process technology.
  • Memory clock speed of Radeon HD 6550A is 1594 MHz higher, than GeForce GTX 660.

Game benchmarks

high / 1080p 20−22 0−1
ultra / 1080p 12−14
QHD / 1440p 6−7 0−1
4K / 2160p 5−6
low / 720p 40−45 1−2
medium / 1080p 24−27 0−1
The average gaming FPS of GeForce GTX 660 in Assassin's Creed Odyssey is 4100% more, than Radeon HD 6550A.

Full Specs

  GeForce GTX 660 Radeon HD 6550A
Architecture Kepler TeraScale 2
Code name GK106 Pinewood
Type Desktop Desktop
Release date 6 September 2012 7 February 2011
Pipelines 960 480
Core clock speed 980 MHz 550 MHz
Boost Clock 1033 MHz
Transistor count 2,540 million 627 million
Manufacturing process technology 28 nm 40 nm
Texture fill rate 78.4 billion/sec 13.20
Floating-point performance 1,981 gflops 624.0 gflops
Length 9.5" (24.1 cm)
Memory bus width 192-bit GDDR5 128 Bit
Memory clock speed 6.0 GB/s 1600 MHz
Memory bandwidth 144.2 GB/s 25.6 GB/s
DirectX 12 (11_0) 11.2 (11_0)
Shader Model 5.1 5.0
OpenGL 4.3 4.4
OpenCL 1.2 1.2
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
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