GeForce 940MX and GeForce GT 420M - video card comparison
Passmark - benchmark score GeForce 940MX vs GeForce GT 420M
GeForce 940MX
1561
GeForce GT 420M
417
GeForce 940MX
GeForce GT 420M
Architecture
Maxwell (2014−2018)
Fermi (2010−2014)
GPU code name
N16S-GTR-B/S
N11P-GE
Market segment
Laptop
Laptop
Release date
March 2016
September 2010
Bus support
PCI Express 3.0
-
Interface
PCIe 3.0 x8
PCIe 2.0 x16
Supplementary power connectors
None
-
Boost clock speed
1242 MHz
-
Core clock speed
1122 MHz
500 MHz
CUDA cores
-
96
Floating-point performance
762.6 gflops
192 gflops
Manufacturing process technology
28 nm
40 nm
Number of transistors
1,870 million
585 million
Pipelines / CUDA cores
384
96
Power consumption (TDP)
23 Watt
23 Watt
Texture fill rate
23.83
6.0 billion/sec
Memory type
DDR3, GDDR5
(G)DDR3
Maximum RAM amount
4 GB
1 GB
Memory bus width
64 Bit
128 Bit
Memory clock speed
4000 MHz
800 MHz
Memory bandwidth
40.1 GB/s
25.6 GB/s
Shared memory
-
-
Display Connectors
No outputs
No outputs
DirectX
12 (11_0)
12 API
CUDA
+
+
OpenCL
1.2
1.1
OpenGL
4.5
4.5
Shader Model
5.1
5.1
Vulkan
1.1
N/A
GameWorks
+
-
GPU Boost
2.0
-
Optimus
+
-