GeForce GTX 660 vs Radeon HD 7950

In this comparison between GeForce GTX 660 and Radeon HD 7950 you will find out which graphics card performs better in today's games. Bear in mind that third-party versions may have more efficient cooling and higher clock speeds. This will increase cards' performance, though not by much. In addition to raw power you should also take into account the dimensions. Thicker models simply will not fit into a small mini-ITX case. The resolution of your monitor also affects the choice, since 4K gameplay requires a more powerful GPU. And don't overspend on the graphics card. Other parts of your build may also need to be upgraded, save some money for the CPU or power supply. For some people GeForce GTX 660 will be the best choice, for others Radeon HD 7950 will be their preference. Study the comparison tables below and make your choice.

Main Specs

  GeForce GTX 660 Radeon HD 7950
Power consumption (TDP) 140 Watt 200 Watt
Interface PCIe 3.0 x16 PCIe 3.0 x16
Supplementary power connectors One 6-pin 2x 6-pin
Memory type GDDR5 GDDR5
Maximum RAM amount 2 GB 3 GB
Display Connectors 2x DVI, 1x HDMI, 1x DisplayPort 1x DVI, 1x HDMI, 2x mini-DisplayPort
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  • Radeon HD 7950 has 42% more power consumption, than GeForce GTX 660.
  • Both video cards are using PCIe 3.0 x16 interface connection to a motherboard.
  • Radeon HD 7950 has 1 GB more memory, than GeForce GTX 660.
  • Both cards are used in Desktops.
  • GeForce GTX 660 is build with Kepler architecture, and Radeon HD 7950 - with GCN 1.0.
  • GeForce GTX 660 and Radeon HD 7950 are manufactured by 28 nm process technology.
  • Radeon HD 7950 is 258 mm longer, than GeForce GTX 660.
  • Memory clock speed of Radeon HD 7950 is 1244 MHz higher, than GeForce GTX 660.

Game benchmarks

high / 1080p 20−22 35−40
ultra / 1080p 12−14 21−24
QHD / 1440p 6−7 16−18
4K / 2160p 5−6 10−11
low / 720p 40−45 60−65
medium / 1080p 24−27 40−45
The average gaming FPS of Radeon HD 7950 in Assassin's Creed Odyssey is 68% more, than GeForce GTX 660.

Full Specs

  GeForce GTX 660 Radeon HD 7950
Architecture Kepler GCN 1.0
Code name GK106 Tahiti
Type Desktop Desktop
Release date 6 September 2012 31 January 2012
Pipelines 960 1792
Core clock speed 980 MHz
Boost Clock 1033 MHz 1250 MHz
Transistor count 2,540 million 4,313 million
Manufacturing process technology 28 nm 28 nm
Texture fill rate 78.4 billion/sec 89.60
Floating-point performance 1,981 gflops 2,867 gflops
Length 9.5" (24.1 cm) 267 mm
Memory bus width 192-bit GDDR5 384 Bit
Memory clock speed 6.0 GB/s 1250 MHz
Memory bandwidth 144.2 GB/s 240 GB/s
DirectX 12 (11_0)
Shader Model 5.1 5.1
OpenGL 4.3 4.6
OpenCL 1.2 1.2
Vulkan 1.1.126
CUDA +
Monero / XMR (CryptoNight) 0.56 kh/s
FreeSync +
CUDA cores 960
Bus support PCI Express 3.0 PCIe 3.0 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 381 Mh/s
Eyefinity +
PowerTune +
ZeroCore +
Design reference
Number of Eyefinity displays 6
CrossFire +
Decred / DCR (Decred) 0.78 Gh/s
Ethereum / ETH (DaggerHashimoto) 13.86 Mh/s
Zcash / ZEC (Equihash) 250 Sol/s
Compute units 28
AppAcceleration +
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