GeForce GT 640 Rev. 2 and Radeon X1600 XT - video card comparison
GeForce GT 640 Rev. 2
Radeon X1600 XT
Architecture
Kepler 2.0 (2013−2015)
R500 (2005−2007)
GPU code name
GK208
RV530
Market segment
Desktop
Desktop
Release date
May 2013
October 2007
Interface
PCIe 2.0 x8
PCIe 1.0 x16
Supplementary power connectors
None
None
Core clock speed
1046 MHz
590 MHz
Floating-point performance
803.3 gflops
-
Manufacturing process technology
28 nm
90 nm
Number of transistors
915 million
157 million
Pipelines / CUDA cores
384
-
Power consumption (TDP)
49 Watt
42 Watt
Texture fill rate
33.47
2.360
Memory type
GDDR5
GDDR3
Maximum RAM amount
1 GB
256 MB
Memory bus width
64 Bit
128 Bit
Memory clock speed
5008 MHz
1380 MHz
Memory bandwidth
40.06 GB/s
22.08 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
2.0
Shader Model
5.1
3.0
Vulkan
1.1.126
N/A