GeForce GTX 660 OEM and GeForce 940MX - video card comparison
GeForce GTX 660 OEM
GeForce 940MX
Architecture
Kepler (2012−2018)
Maxwell (2014−2018)
GPU code name
GK104
N16S-GTR-B/S
Market segment
Desktop
Laptop
Release date
August 2012
March 2016
Bus support
-
PCI Express 3.0
Interface
PCIe 3.0 x16
PCIe 3.0 x8
Supplementary power connectors
1x 6-pin
None
Boost clock speed
888 MHz
1242 MHz
Core clock speed
823 MHz
1122 MHz
Floating-point performance
2,046 gflops
762.6 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
3,540 million
1,870 million
Pipelines / CUDA cores
1152
384
Power consumption (TDP)
130 Watt
23 Watt
Texture fill rate
85.25
23.83
Memory type
GDDR5
DDR3, GDDR5
Maximum RAM amount
2 GB
4 GB
Memory bus width
256 Bit
64 Bit
Memory clock speed
5600 MHz
4000 MHz
Memory bandwidth
179.2 GB/s
40.1 GB/s
Shared memory
-
-
Display Connectors
2x DVI, 1x HDMI, 1x DisplayPort
No outputs
HDMI
+
-
DirectX
12 (11_0)
12 (11_0)
CUDA
3.0
+
OpenCL
1.2
1.2
OpenGL
4.6
4.5
Shader Model
5.1
5.1
Vulkan
1.1.126
1.1
GameWorks
-
+
GPU Boost
-
2.0
Optimus
-
+