GeForce GT 640 and Radeon R5 M420 - video card comparison
Passmark - benchmark score GeForce GT 640 vs Radeon R5 M420
GeForce GT 640
1209
Radeon R5 M420
501
GeForce GT 640
Radeon R5 M420
Architecture
Kepler (2012−2018)
GCN (2011−2017)
GPU code name
GK107
Jet
Market segment
Desktop
Laptop
Release date
June 2012
June 2016
Interface
PCIe 3.0 x16
PCIe 3.0 x8
Supplementary power connectors
None
-
Boost clock speed
-
850 MHz
Core clock speed
902 MHz
780 MHz
Floating-point performance
692.7 gflops
547.2 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
1,270 million
690 million
Pipelines / CUDA cores
384
320
Power consumption (TDP)
65 Watt
-
Texture fill rate
28.86
17.00
Memory type
DDR3
DDR3
Maximum RAM amount
2 GB
4 GB
Memory bus width
128 Bit
64 Bit
Memory clock speed
1782 MHz
2000 MHz
Memory bandwidth
28.51 GB/s
16 GB/s
Shared memory
-
-
Display Connectors
1x DVI, 1x HDMI, 1x DisplayPort
No outputs
HDMI
+
-
DirectX
12 (11_0)
12 (11_1)
CUDA
3.0
-
OpenCL
1.2
1.2
OpenGL
4.6
4.6
Shader Model
5.1
5.1
Vulkan
1.1.126
1.2.131