GeForce GT 640 and GeForce 7800 GTX - video card comparison
Passmark - benchmark score GeForce GT 640 vs GeForce 7800 GTX
GeForce GT 640
1209
GeForce 7800 GTX
299
GeForce GT 640
GeForce 7800 GTX
Architecture
Kepler (2012−2018)
Curie (2003−2013)
GPU code name
GK107
G70
Market segment
Desktop
Desktop
Release date
June 2012
June 2005
Interface
PCIe 3.0 x16
PCIe 1.0 x16
Supplementary power connectors
None
-
Core clock speed
902 MHz
430 MHz
Floating-point performance
692.7 gflops
-
Manufacturing process technology
28 nm
110 nm
Number of transistors
1,270 million
302 million
Pipelines / CUDA cores
384
-
Power consumption (TDP)
65 Watt
86 Watt
Texture fill rate
28.86
10.32
Memory type
DDR3
GDDR3
Maximum RAM amount
2 GB
256 MB
Memory bus width
128 Bit
256 Bit
Memory clock speed
1782 MHz
1200 MHz
Memory bandwidth
28.51 GB/s
38.4 GB/s
Display Connectors
1x DVI, 1x HDMI, 1x DisplayPort
2x DVI, 1x S-Video
HDMI
+
-
DirectX
12 (11_0)
9.0c (9_3)
CUDA
3.0
-
OpenCL
1.2
N/A
OpenGL
4.6
2.1
Shader Model
5.1
3.0
Vulkan
1.1.126
N/A