GeForce GT 640 OEM and Radeon X800 GT - video card comparison
GeForce GT 640 OEM
Radeon X800 GT
Architecture
Kepler (2012−2018)
R400 (2004−2008)
GPU code name
GK107
R480
Market segment
Desktop
Desktop
Release date
April 2012
November 2005
Interface
PCIe 3.0 x16
PCIe 1.0 x16
Supplementary power connectors
None
None
Core clock speed
797 MHz
475 MHz
Floating-point performance
612.1 gflops
-
Manufacturing process technology
28 nm
130 nm
Number of transistors
1,270 million
160 million
Pipelines / CUDA cores
384
-
Power consumption (TDP)
50 Watt
40 Watt
Texture fill rate
25.50
5.700
Memory type
DDR3
DDR
Maximum RAM amount
2 GB
128 MB
Memory bus width
128 Bit
256 Bit
Memory clock speed
1782 MHz
986 MHz
Memory bandwidth
28.51 GB/s
31.55 GB/s
Display Connectors
1x DVI, 1x HDMI, 1x DisplayPort
1x DVI, 1x VGA, 1x S-Video
HDMI
+
-
DirectX
12 (11_0)
9.0b (9_2)
CUDA
3.0
-
OpenCL
1.2
N/A
OpenGL
4.6
2.0
Shader Model
5.1
-
Vulkan
1.1.126
N/A