GeForce GT 640M Mac Edition and HD Graphics 405 - video card comparison
GeForce GT 640M Mac Edition
HD Graphics 405
Architecture
Kepler (2012−2018)
Gen. 8 (2015−2016)
GPU code name
GK107
Braswell
Market segment
Desktop
Laptop
Release date
February 2013
April 2016
Interface
PCIe 3.0 x16
PCIe 3.0 x1
Boost clock speed
-
700 MHz
Core clock speed
745 MHz
320 MHz
Floating-point performance
572.2 gflops
213.1 gflops
Manufacturing process technology
28 nm
14 nm
Number of transistors
1,270 million
189 million
Pipelines / CUDA cores
384
16
Power consumption (TDP)
32 Watt
6 Watt
Texture fill rate
23.84
11.20
Memory type
GDDR5
System Shared
Maximum RAM amount
512 MB
System Shared
Memory bus width
64 Bit
64/128 Bit
Memory clock speed
5000 MHz
System Shared
Memory bandwidth
40 GB/s
-
Shared memory
-
+
Display Connectors
No outputs
No outputs
DirectX
12 (11_0)
12 (11_1)
CUDA
3.0
-
OpenCL
1.2
2.0
OpenGL
4.6
4.3
Shader Model
5.1
5.1
Vulkan
1.1.126
1.1.80