GeForce GT 640 and Radeon X1950 XTX Uber Edition - video card comparison
GeForce GT 640
Radeon X1950 XTX Uber Edition
Architecture
Kepler (2012−2018)
R500 (2005−2007)
GPU code name
GK107
R580+
Market segment
Desktop
Desktop
Release date
June 2012
January 2007
Interface
PCIe 3.0 x16
PCIe 1.0 x16
Supplementary power connectors
None
1x 6-pin
Core clock speed
902 MHz
670 MHz
Floating-point performance
692.7 gflops
-
Manufacturing process technology
28 nm
90 nm
Number of transistors
1,270 million
384 million
Pipelines / CUDA cores
384
-
Power consumption (TDP)
65 Watt
125 Watt
Texture fill rate
28.86
10.72
Memory type
DDR3
GDDR4
Maximum RAM amount
2 GB
512 MB
Memory bus width
128 Bit
256 Bit
Memory clock speed
1782 MHz
2100 MHz
Memory bandwidth
28.51 GB/s
67.2 GB/s
Display Connectors
1x DVI, 1x HDMI, 1x DisplayPort
1x DVI, 1x VHDCI
HDMI
+
-
DirectX
12 (11_0)
9.0c (9_3)
CUDA
3.0
-
OpenCL
1.2
N/A
OpenGL
4.6
2.0
Shader Model
5.1
3.0
Vulkan
1.1.126
N/A