GeForce GT 640 and GeForce 8400 - video card comparison
Passmark - benchmark score GeForce GT 640 vs GeForce 8400
GeForce GT 640
1209
GeForce 8400
83
GeForce GT 640
GeForce 8400
Architecture
Kepler (2012−2018)
Tesla (2006−2010)
GPU code name
GK107
G98
Market segment
Desktop
Desktop
Release date
June 2012
December 2007
Interface
PCIe 3.0 x16
PCIe 2.0 x16
Supplementary power connectors
None
None
Core clock speed
902 MHz
540 MHz
Floating-point performance
692.7 gflops
20.8 gflops
Manufacturing process technology
28 nm
65 nm
Number of transistors
1,270 million
210 million
Pipelines / CUDA cores
384
8
Power consumption (TDP)
65 Watt
25 Watt
Texture fill rate
28.86
4.320
Memory type
DDR3
DDR2
Maximum RAM amount
2 GB
256 MB
Memory bus width
128 Bit
64 Bit
Memory clock speed
1782 MHz
1000 MHz
Memory bandwidth
28.51 GB/s
8 GB/s
Display Connectors
1x DVI, 1x HDMI, 1x DisplayPort
1x DVI, 1x VGA, 1x S-Video
HDMI
+
-
DirectX
12 (11_0)
11.1 (10_0)
CUDA
3.0
1.1
OpenCL
1.2
1.1
OpenGL
4.6
3.3
Shader Model
5.1
4.0
Vulkan
1.1.126
N/A