GeForce GTX 660 vs GeForce GTX 670MX SLI

Find out if it is worth upgrading your current GPU setup by comparing GeForce GTX 660 and GeForce GTX 670MX SLI. 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 GeForce GTX 670MX SLI. 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.

GeForce GTX 670MX SLI is a Laptop Graphics Card

Note: GeForce GTX 670MX SLI is only used in laptop graphics. It has lower GPU clock speed compared to the desktop variant, which results in lower power consumption, but also 10-30% lower gaming performance. Check available laptop models with GeForce GTX 670MX SLI here:

Main Specs

  GeForce GTX 660 GeForce GTX 670MX SLI
Power consumption (TDP) 140 Watt 150 Watt
Interface PCIe 3.0 x16
Supplementary power connectors One 6-pin
Memory type GDDR5 GDDR5
Maximum RAM amount 2 GB
Display Connectors 2x DVI, 1x HDMI, 1x DisplayPort
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  • GeForce GTX 670MX SLI has 7% more power consumption, than GeForce GTX 660.
  • GeForce GTX 660 is used in Desktops, and GeForce GTX 670MX SLI - in Laptops.
  • GeForce GTX 660 and GeForce GTX 670MX SLI are build with Kepler architecture.
  • Core clock speed of GeForce GTX 660 is 380 MHz higher, than GeForce GTX 670MX SLI.
  • GeForce GTX 660 and GeForce GTX 670MX SLI are manufactured by 28 nm process technology.
  • Memory clock speed of GeForce GTX 670MX SLI is 2794 MHz higher, than GeForce GTX 660.

Game benchmarks

high / 1080p 20−22 21−24
ultra / 1080p 12−14 14−16
QHD / 1440p 6−7 8−9
4K / 2160p 5−6 5−6
low / 720p 40−45 40−45
medium / 1080p 24−27 27−30
The average gaming FPS of GeForce GTX 670MX SLI in Assassin's Creed Odyssey is 5% more, than GeForce GTX 660.

Full Specs

  GeForce GTX 660 GeForce GTX 670MX SLI
Architecture Kepler Kepler
Code name GK106 N13E-GR
Type Desktop Laptop
Release date 6 September 2012 1 October 2012
Pipelines 960 1920
Core clock speed 980 MHz 600 MHz
Boost Clock 1033 MHz
Transistor count 2,540 million 5080 Million
Manufacturing process technology 28 nm 28 nm
Texture fill rate 78.4 billion/sec
Floating-point performance 1,981 gflops
Length 9.5" (24.1 cm)
Memory bus width 192-bit GDDR5 2x 192 Bit
Memory clock speed 6.0 GB/s 2800 MHz
Memory bandwidth 144.2 GB/s
Shared memory -
DirectX 12 (11_0) DirectX 11, Shader 5.1
Shader Model 5.1
OpenGL 4.3
OpenCL 1.2
Vulkan 1.1.126
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
Laptop size large
Optimus +
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