GeForce GT 640 OEM and Radeon X800 PRO - video card comparison
GeForce GT 640 OEM
Radeon X800 PRO
Architecture
Kepler (2012−2018)
R400 (2004−2008)
GPU code name
GK107
R423
Market segment
Desktop
Desktop
Release date
April 2012
May 2004
Interface
PCIe 3.0 x16
PCIe 1.0 x16
Supplementary power connectors
None
1x Molex
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
48 Watt
Texture fill rate
25.50
5.700
Memory type
DDR3
GDDR3
Maximum RAM amount
2 GB
256 MB
Memory bus width
128 Bit
256 Bit
Memory clock speed
1782 MHz
900 MHz
Memory bandwidth
28.51 GB/s
28.8 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