GeForce GT 640 and Radeon HD 7450 OEM - video card comparison
GeForce GT 640
Radeon HD 7450 OEM
Architecture
Kepler (2012−2018)
TeraScale 2 (2009−2015)
GPU code name
GK107
Caicos
Market segment
Desktop
Desktop
Release date
June 2012
January 2012
Interface
PCIe 3.0 x16
PCIe 2.0 x16
Supplementary power connectors
None
None
Core clock speed
902 MHz
625 MHz
Floating-point performance
692.7 gflops
200.0 gflops
Manufacturing process technology
28 nm
40 nm
Number of transistors
1,270 million
370 million
Pipelines / CUDA cores
384
160
Power consumption (TDP)
65 Watt
18 Watt
Texture fill rate
28.86
5.000
Memory type
DDR3
GDDR3
Maximum RAM amount
2 GB
512 MB
Memory bus width
128 Bit
64 Bit
Memory clock speed
1782 MHz
1066 MHz
Memory bandwidth
28.51 GB/s
8.528 GB/s
Display Connectors
1x DVI, 1x HDMI, 1x DisplayPort
1x DVI, 1x HDMI
HDMI
+
+
DirectX
12 (11_0)
11.2 (11_0)
CUDA
3.0
-
OpenCL
1.2
1.2
OpenGL
4.6
4.4
Shader Model
5.1
5.0
Vulkan
1.1.126
N/A