GeForce GT 640 and GeForce GTX 850A - video card comparison
Passmark - benchmark score GeForce GT 640 vs GeForce GTX 850A
GeForce GT 640
1209
GeForce GTX 850A
1080
GeForce GT 640
GeForce GTX 850A
Architecture
Kepler (2012−2018)
Maxwell (2014−2018)
GPU code name
GK107
GM107
Market segment
Desktop
Desktop
Release date
June 2012
March 2014
Interface
PCIe 3.0 x16
PCIe 3.0 x16
Supplementary power connectors
None
-
Boost clock speed
-
936 MHz
Core clock speed
902 MHz
902 MHz
Floating-point performance
692.7 gflops
1,198 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
1,270 million
1,870 million
Pipelines / CUDA cores
384
640
Power consumption (TDP)
65 Watt
45 Watt
Texture fill rate
28.86
37.44
Memory type
DDR3
DDR3
Maximum RAM amount
2 GB
2 GB
Memory bus width
128 Bit
128 Bit
Memory clock speed
1782 MHz
1800 MHz
Memory bandwidth
28.51 GB/s
28.8 GB/s
Display Connectors
1x DVI, 1x HDMI, 1x DisplayPort
No outputs
HDMI
+
-
DirectX
12 (11_0)
12 (11_0)
CUDA
3.0
5.0
OpenCL
1.2
1.2
OpenGL
4.6
4.6
Shader Model
5.1
5.1
Vulkan
1.1.126
1.1.126