GeForce GTS 450 and GeForce GT 640 Rev. 2 - video card comparison
GeForce GTS 450
GeForce GT 640 Rev. 2
Architecture
Fermi (2010−2014)
Kepler 2.0 (2013−2015)
GPU code name
GF106
GK208
Market segment
Desktop
Desktop
Release date
September 2010
May 2013
Bus support
PCI-E 2.0 x 16
-
Interface
PCIe 2.0 x16
PCIe 2.0 x8
Supplementary power connectors
6-pin
None
SLI options
+
-
Core clock speed
783 MHz
1046 MHz
CUDA cores
192
-
Floating-point performance
601.3 gflops
803.3 gflops
Manufacturing process technology
40 nm
28 nm
Number of transistors
1,170 million
915 million
Pipelines / CUDA cores
192
384
Power consumption (TDP)
106 Watt
49 Watt
Maximum GPU temperature
100 °C
-
Texture fill rate
25.1 billion/sec
33.47
Memory type
GDDR5
GDDR5
Maximum RAM amount
1 GB
1 GB
Memory bus width
128 Bit
64 Bit
Memory clock speed
1804 (3608 data rate) MHz
5008 MHz
Memory bandwidth
57.7 GB/s
40.06 GB/s
Display Connectors
Mini HDMITwo Dual Link DVI
1x DVI, 1x HDMI, 1x VGA
HDMI
+
+
Maximum VGA resolution
2048x1536
-
Audio input for HDMI
Internal
-
DirectX
12 (11_0)
12 (11_0)
CUDA
+
3.5
OpenCL
1.1
1.2
OpenGL
4.2
4.6
Shader Model
5.1
5.1
Vulkan
N/A
1.1.126