GeForce GT 640 Rev. 2 and Radeon X800 PRO - video card comparison
GeForce GT 640 Rev. 2
Radeon X800 PRO
Architecture
Kepler 2.0 (2013−2015)
R400 (2004−2008)
GPU code name
GK208
R423
Market segment
Desktop
Desktop
Release date
May 2013
May 2004
Interface
PCIe 2.0 x8
PCIe 1.0 x16
Supplementary power connectors
None
1x Molex
Core clock speed
1046 MHz
475 MHz
Floating-point performance
803.3 gflops
-
Manufacturing process technology
28 nm
130 nm
Number of transistors
915 million
160 million
Pipelines / CUDA cores
384
-
Power consumption (TDP)
49 Watt
48 Watt
Texture fill rate
33.47
5.700
Memory type
GDDR5
GDDR3
Maximum RAM amount
1 GB
256 MB
Memory bus width
64 Bit
256 Bit
Memory clock speed
5008 MHz
900 MHz
Memory bandwidth
40.06 GB/s
28.8 GB/s
Display Connectors
1x DVI, 1x HDMI, 1x VGA
1x DVI, 1x VGA, 1x S-Video
HDMI
+
-
DirectX
12 (11_0)
9.0b (9_2)
CUDA
3.5
-
OpenCL
1.2
N/A
OpenGL
4.6
2.0
Shader Model
5.1
-
Vulkan
1.1.126
N/A