GeForce GT 640 and GeForce 8800 GTS 640 - video card comparison
GeForce GT 640
GeForce 8800 GTS 640
Architecture
Kepler (2012−2018)
Tesla (2006−2010)
GPU code name
GK107
G80
Market segment
Desktop
Desktop
Release date
June 2012
November 2006
Interface
PCIe 3.0 x16
PCIe 1.0 x16
Supplementary power connectors
None
1x 6-pin
Core clock speed
902 MHz
513 MHz
Floating-point performance
692.7 gflops
228.1 gflops
Manufacturing process technology
28 nm
90 nm
Number of transistors
1,270 million
681 million
Pipelines / CUDA cores
384
96
Power consumption (TDP)
65 Watt
143 Watt
Texture fill rate
28.86
24.62
Memory type
DDR3
GDDR3
Maximum RAM amount
2 GB
640 MB
Memory bus width
128 Bit
320 Bit
Memory clock speed
1782 MHz
1584 MHz
Memory bandwidth
28.51 GB/s
63.36 GB/s
Display Connectors
1x DVI, 1x HDMI, 1x DisplayPort
2x DVI, 1x S-Video
HDMI
+
-
DirectX
12 (11_0)
11.1 (10_0)
CUDA
3.0
+
OpenCL
1.2
1.1
OpenGL
4.6
3.3
Shader Model
5.1
4.0
Vulkan
1.1.126
N/A