GeForce GTX 660 vs Radeon 550X

Find out if it is worth upgrading your current GPU setup by comparing GeForce GTX 660 and Radeon 550X. 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 660 and Radeon 550X. 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.

Main Specs

  GeForce GTX 660 Radeon 550X
Power consumption (TDP) 140 Watt 50 Watt
Interface PCIe 3.0 x16 PCIe 3.0 x8
Supplementary power connectors One 6-pin None
Memory type GDDR5 GDDR5
Maximum RAM amount 2 GB 2 GB
Display Connectors 2x DVI, 1x HDMI, 1x DisplayPort 1x DVI, 1x HDMI, 1x DisplayPort
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  • GeForce GTX 660 has 180% more power consumption, than Radeon 550X.
  • GeForce GTX 660 is connected by PCIe 3.0 x16, and Radeon 550X uses PCIe 3.0 x8 interface.
  • GeForce GTX 660 and Radeon 550X have maximum RAM of 2 GB.
  • Both cards are used in Desktops.
  • GeForce GTX 660 is build with Kepler architecture, and Radeon 550X - with GCN 4.0.
  • Core clock speed of Radeon 550X is 102 MHz higher, than GeForce GTX 660.
  • GeForce GTX 660 is manufactured by 28 nm process technology, and Radeon 550X - by 14 nm process technology.
  • Radeon 550X is 136 mm longer, than GeForce GTX 660.
  • Memory clock speed of Radeon 550X is 6994 MHz higher, than GeForce GTX 660.

Game benchmarks

high / 1080p 20−22 7−8
ultra / 1080p 12−14 4−5
QHD / 1440p 6−7 0−1
4K / 2160p 5−6
low / 720p 40−45 16−18
medium / 1080p 24−27 9−10
The average gaming FPS of GeForce GTX 660 in Assassin's Creed Odyssey is 177% more, than Radeon 550X.

Full Specs

  GeForce GTX 660 Radeon 550X
Architecture Kepler GCN 4.0
Code name GK106 Lexa
Type Desktop Desktop
Release date 6 September 2012 27 March 2019
Pipelines 960 512
Core clock speed 980 MHz 1082 MHz
Boost Clock 1033 MHz 1218 MHz
Transistor count 2,540 million 2,200 million
Manufacturing process technology 28 nm 14 nm
Texture fill rate 78.4 billion/sec 38.98
Floating-point performance 1,981 gflops
Length 9.5" (24.1 cm) 145 mm
Memory bus width 192-bit GDDR5 128 Bit
Memory clock speed 6.0 GB/s 7000 MHz
Memory bandwidth 144.2 GB/s 112.0 GB/s
DirectX 12 (11_0) 12 (12_0)
Shader Model 5.1 6.4
OpenGL 4.3 4.6
OpenCL 1.2 2.0
Vulkan 1.1.126 1.2.131
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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