GeForce GTX 660 vs GeForce GTX 980

When choosing between GeForce GTX 660 and GeForce GTX 980, it is worth examining the specifications of the models in detail. Do they meet the recommended requirements of modern games and software? Storage capacity, form factor, TDP, available ports, warranty and manufacturer support are all important. For example, the size of a PC case can limit the maximum thickness and length of the card. Often, instead of the factory overclocked card and RGB backlight, it is better to choose a reference model with a more efficient GPU. And make sure that your current power supply unit has the correct connection pins (using adapters is not recommended). This GPUs compare tool is meant to help you to choose the best graphics card for your build. Let's find out the difference between GeForce GTX 660 and GeForce GTX 980.

Main Specs

  GeForce GTX 660 GeForce GTX 980
Power consumption (TDP) 140 Watt 165 Watt
Interface PCIe 3.0 x16 PCIe 3.0 x16
Supplementary power connectors One 6-pin 2x 6-pins
Memory type GDDR5 GDDR5
Maximum RAM amount 2 GB 4 GB
Display Connectors 2x DVI, 1x HDMI, 1x DisplayPort 1x DVI, 1x HDMI, 3x DisplayPort
Recommended system power (PSU) 500 Watt
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  • GeForce GTX 980 has 17% more power consumption, than GeForce GTX 660.
  • Both video cards are using PCIe 3.0 x16 interface connection to a motherboard.
  • GeForce GTX 980 has 2 GB more memory, than GeForce GTX 660.
  • Both cards are used in Desktops.
  • GeForce GTX 660 is build with Kepler architecture, and GeForce GTX 980 - with Maxwell.
  • GeForce GTX 660 and GeForce GTX 980 are manufactured by 28 nm process technology.
  • GeForce GTX 980 is 1 mm longer, than GeForce GTX 660.
  • Memory clock speed of GeForce GTX 980 is 1 MHz higher, than GeForce GTX 660.

Game benchmarks

high / 1080p 20−22 55−60
ultra / 1080p 12−14 35−40
QHD / 1440p 6−7 30−35
4K / 2160p 5−6 18−20
low / 720p 40−45 80−85
medium / 1080p 24−27 65−70
The average gaming FPS of GeForce GTX 980 in Assassin's Creed Odyssey is 157% more, than GeForce GTX 660.

Full Specs

  GeForce GTX 660 GeForce GTX 980
Architecture Kepler Maxwell
Code name GK106 GM204
Type Desktop Desktop
Release date 6 September 2012 19 September 2014
Pipelines 960 2048
Core clock speed 980 MHz
Boost Clock 1033 MHz 1216 MHz
Transistor count 2,540 million 5,200 million
Manufacturing process technology 28 nm 28 nm
Texture fill rate 78.4 billion/sec 144 billion/sec
Floating-point performance 1,981 gflops 4,981 gflops
Length 9.5" (24.1 cm) 10.5" (26.7 cm)
Memory bus width 192-bit GDDR5 256 Bit
Memory clock speed 6.0 GB/s 7.0 GB/s
Memory bandwidth 144.2 GB/s 224 GB/s
Shared memory -
G-SYNC support +
DirectX 12 (11_0) 12 (12_1)
Shader Model 5.1 6.4
OpenGL 4.3 4.5
OpenCL 1.2 1.2
Vulkan 1.1.126 1.1.126
CUDA + +
Monero / XMR (CryptoNight) 0.54 kh/s
CUDA cores 960 2048
Bus support PCI Express 3.0 PCI Express 3.0
Height 4.376" (11.1 cm) 4.376" (11.1 cm)
SLI options + +
Multi monitor support 4 displays 4 displays
HDMI + +
HDCP + +
Maximum VGA resolution 2048x1536 2048x1536
Audio input for HDMI Internal Internal
3D Blu-Ray +
3D Gaming +
3D Vision +
Bitcoin / BTC (SHA256) 66 Mh/s 579 Mh/s
DisplayPort Multimode (DP++) support +
H.264, VC1, MPEG2 1080p video decoder +
Optimus +
Decred / DCR (Decred) 1.74 Gh/s
Ethereum / ETH (DaggerHashimoto) 20.28 Mh/s
Zcash / ZEC (Equihash) 312.12 Sol/s
GameStream +
GeForce ShadowPlay +
GPU Boost 2.0
GameWorks +
BatteryBoost +
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