GeForce GT 640 Rev. 2 and Radeon HD 4650 - video card comparison
GeForce GT 640 Rev. 2
Radeon HD 4650
Architecture
Kepler 2.0 (2013−2015)
TeraScale (2005−2013)
GPU code name
GK208
RV730
Market segment
Desktop
Desktop
Release date
May 2013
September 2008
Interface
PCIe 2.0 x8
PCIe 2.0 x16
Supplementary power connectors
None
-
Core clock speed
1046 MHz
600 MHz
Floating-point performance
803.3 gflops
384.0 gflops
Manufacturing process technology
28 nm
55 nm
Number of transistors
915 million
514 million
Pipelines / CUDA cores
384
320
Power consumption (TDP)
49 Watt
48 Watt
Texture fill rate
33.47
19.20
Memory type
GDDR5
GDDR3
Maximum RAM amount
1 GB
256 MB
Memory bus width
64 Bit
128 Bit
Memory clock speed
5008 MHz
1400 MHz
Memory bandwidth
40.06 GB/s
22.4 GB/s
Display Connectors
1x DVI, 1x HDMI, 1x VGA
2x DVI, 1x S-Video
HDMI
+
-
DirectX
12 (11_0)
10.1 (10_1)
CUDA
3.5
-
OpenCL
1.2
1.1
OpenGL
4.6
3.3
Shader Model
5.1
4.1
Vulkan
1.1.126
N/A