GeForce GT 640 Rev. 2 and Radeon X1550 - video card comparison
GeForce GT 640 Rev. 2
Radeon X1550
Architecture
Kepler 2.0 (2013−2015)
Ultra-Threaded SE
GPU code name
GK208
RV516
Market segment
Desktop
Desktop
Release date
May 2013
2007
Interface
PCIe 2.0 x8
PCIe 1.0 x16
Supplementary power connectors
None
None
Core clock speed
1046 MHz
550 MHz
Floating-point performance
803.3 gflops
-
Manufacturing process technology
28 nm
90 nm
Number of transistors
915 million
105 million
Pipelines / CUDA cores
384
-
Power consumption (TDP)
49 Watt
27 Watt
Texture fill rate
33.47
2.200
Memory type
GDDR5
DDR2
Maximum RAM amount
1 GB
256 MB
Memory bus width
64 Bit
128 Bit
Memory clock speed
5008 MHz
800 MBps
Memory bandwidth
40.06 GB/s
12.8 GB/s
Display Connectors
1x DVI, 1x HDMI, 1x VGA
1x DVI, 1x VGA, 1x S-Video
HDMI
+
-
DirectX
12 (11_0)
9.0c (9_3)
CUDA
3.5
-
OpenCL
1.2
N/A
OpenGL
4.6
2.1
Shader Model
5.1
3.0
Vulkan
1.1.126
N/A