GeForce GTX 660 vs Radeon HD 6770

When comparing GeForce GTX 660 and Radeon HD 6770, we look primarily at benchmarks and game tests. But it is not only about the numbers. Often you can find third-party models with higher clock speeds, better cooling, or a customizable RGB lighting. Not all of them will have all the features you need. Another thing to consider is the port selection. Most graphics cards have at least one DisplayPort and HDMI interface, but some monitors require DVI. Before you buy, check the TDP of the graphics card - this characteristic will help you estimate the consumption of the graphics card. You may even have to upgrade your PSU to meet its requirements. An important factor when choosing between GeForce GTX 660 and Radeon HD 6770 is the price. Does the additional cost justify the performance hit? Our comparison should help you make the right decision.

Main Specs

  GeForce GTX 660 Radeon HD 6770
Power consumption (TDP) 140 Watt 108 Watt
Interface PCIe 3.0 x16 PCIe 2.0 x16
Supplementary power connectors One 6-pin 1x 6-pin
Memory type GDDR5 GDDR5
Maximum RAM amount 2 GB 1 GB
Display Connectors 2x DVI, 1x HDMI, 1x DisplayPort 2x DVI, 1x HDMI, 2x mini-DisplayPort
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  • GeForce GTX 660 has 29% more power consumption, than Radeon HD 6770.
  • GeForce GTX 660 is connected by PCIe 3.0 x16, and Radeon HD 6770 uses PCIe 2.0 x16 interface.
  • GeForce GTX 660 has 1 GB more memory, than Radeon HD 6770.
  • Both cards are used in Desktops.
  • GeForce GTX 660 is build with Kepler architecture, and Radeon HD 6770 - with TeraScale 2.
  • GeForce GTX 660 is manufactured by 28 nm process technology, and Radeon HD 6770 - by 40 nm process technology.
  • Radeon HD 6770 is 189 mm longer, than GeForce GTX 660.
  • Memory clock speed of Radeon HD 6770 is 1044 MHz higher, than GeForce GTX 660.

Game benchmarks

high / 1080p 20−22 3−4
ultra / 1080p 12−14 1−2
QHD / 1440p 6−7 0−1
4K / 2160p 5−6
low / 720p 40−45 14−16
medium / 1080p 24−27 5−6
The average gaming FPS of GeForce GTX 660 in Assassin's Creed Odyssey is 316% more, than Radeon HD 6770.

Full Specs

  GeForce GTX 660 Radeon HD 6770
Architecture Kepler TeraScale 2
Code name GK106 Juniper
Type Desktop Desktop
Release date 6 September 2012 21 January 2011
Pipelines 960 800
Core clock speed 980 MHz
Boost Clock 1033 MHz 900 MHz
Transistor count 2,540 million 1,040 million
Manufacturing process technology 28 nm 40 nm
Texture fill rate 78.4 billion/sec 34.00
Floating-point performance 1,981 gflops 1,360.0 gflops
Length 9.5" (24.1 cm) 198 mm
Memory bus width 192-bit GDDR5 128 Bit
Memory clock speed 6.0 GB/s 1050 MHz
Memory bandwidth 144.2 GB/s 76.8 GB/s
DirectX 12 (11_0)
Shader Model 5.1 5.0
OpenGL 4.3 4.4
OpenCL 1.2 1.2
Vulkan 1.1.126
CUDA +
CUDA cores 960
Bus support PCI Express 3.0 PCIe 2.0 x16
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 118 Mh/s
Eyefinity +
Design reference
CrossFire +
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