GeForce GT 640 and Radeon R4 Graphics - video card comparison
GeForce GT 640
Radeon R4 Graphics
Architecture
Kepler (2012−2018)
GCN 2.0 (2013−2017)
GPU code name
GK107
Beema
Market segment
Desktop
Desktop
Release date
June 2012
June 2014
Interface
PCIe 3.0 x16
IGP
Supplementary power connectors
None
-
Core clock speed
902 MHz
800 MHz
Floating-point performance
692.7 gflops
204.8 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
1,270 million
930 million
Pipelines / CUDA cores
384
128
Power consumption (TDP)
65 Watt
15 Watt
Texture fill rate
28.86
6.400
Memory type
DDR3
System Shared
Maximum RAM amount
2 GB
System Shared
Memory bus width
128 Bit
System Shared
Memory clock speed
1782 MHz
System Shared
Memory bandwidth
28.51 GB/s
-
Display Connectors
1x DVI, 1x HDMI, 1x DisplayPort
No outputs
HDMI
+
-
DirectX
12 (11_0)
12 (12_0)
CUDA
3.0
-
OpenCL
1.2
2.0
OpenGL
4.6
4.6
Shader Model
5.1
6.3
Vulkan
1.1.126
1.2.131