GeForce GT 640 OEM and Radeon HD 3450 - video card comparison
GeForce GT 640 OEM
Radeon HD 3450
Architecture
Kepler (2012−2018)
TeraScale (2005−2013)
GPU code name
GK107
RV620
Market segment
Desktop
Desktop
Release date
April 2012
December 2007
Interface
PCIe 3.0 x16
PCIe 2.0 x16
Supplementary power connectors
None
None
Core clock speed
797 MHz
600 MHz
Floating-point performance
612.1 gflops
48 gflops
Manufacturing process technology
28 nm
55 nm
Number of transistors
1,270 million
181 million
Pipelines / CUDA cores
384
40
Power consumption (TDP)
50 Watt
25 Watt
Texture fill rate
25.50
2.400
Memory type
DDR3
DDR2
Maximum RAM amount
2 GB
256 MB
Memory bus width
128 Bit
64 Bit
Memory clock speed
1782 MHz
1000 MHz
Memory bandwidth
28.51 GB/s
8 GB/s
Display Connectors
1x DVI, 1x HDMI, 1x DisplayPort
1x DVI, 1x VGA, 1x S-Video
HDMI
+
-
DirectX
12 (11_0)
10.1 (10_1)
CUDA
3.0
-
OpenCL
1.2
N/A
OpenGL
4.6
3.3
Shader Model
5.1
4.1
Vulkan
1.1.126
N/A