GeForce GT 640 and GeForce Go 7900 GS - video card comparison
Passmark - benchmark score GeForce GT 640 vs GeForce Go 7900 GS
GeForce GT 640
1209
GeForce Go 7900 GS
181
GeForce GT 640
GeForce Go 7900 GS
Architecture
Kepler (2012−2018)
G7x (2005−2007)
GPU code name
GK107
G71M
Market segment
Desktop
Laptop
Release date
June 2012
April 2006
Interface
PCIe 3.0 x16
MXM-II
Supplementary power connectors
None
-
Boost clock speed
-
375 MHz
Core clock speed
902 MHz
7 MHz
Floating-point performance
692.7 gflops
-
Manufacturing process technology
28 nm
90 nm
Number of transistors
1,270 million
278 million
Pipelines / CUDA cores
384
27
Power consumption (TDP)
65 Watt
20 Watt
Texture fill rate
28.86
7.500
Memory type
DDR3
GDDR3
Maximum RAM amount
2 GB
512 MB
Memory bus width
128 Bit
256 Bit
Memory clock speed
1782 MHz
1000 MHz
Memory bandwidth
28.51 GB/s
32 GB/s
Shared memory
-
-
Display Connectors
1x DVI, 1x HDMI, 1x DisplayPort
No outputs
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