GeForce GT 640M Mac Edition and Radeon HD 6670A - video card comparison
GeForce GT 640M Mac Edition
Radeon HD 6670A
Architecture
Kepler (2012−2018)
TeraScale 2 (2009−2015)
GPU code name
GK107
Turks
Market segment
Desktop
Desktop
Release date
February 2013
April 2011
Interface
PCIe 3.0 x16
MXM-A (3.0)
Core clock speed
745 MHz
600 MHz
Floating-point performance
572.2 gflops
576.0 gflops
Manufacturing process technology
28 nm
40 nm
Number of transistors
1,270 million
716 million
Pipelines / CUDA cores
384
480
Power consumption (TDP)
32 Watt
45 Watt
Texture fill rate
23.84
14.40
Memory type
GDDR5
GDDR5
Maximum RAM amount
512 MB
1 GB
Memory bus width
64 Bit
128 Bit
Memory clock speed
5000 MHz
4000 MHz
Memory bandwidth
40 GB/s
64 GB/s
Display Connectors
No outputs
No outputs
DirectX
12 (11_0)
11.2 (11_0)
CUDA
3.0
-
OpenCL
1.2
1.2
OpenGL
4.6
4.4
Shader Model
5.1
5.0
Vulkan
1.1.126
N/A