GeForce GT 650M Mac Edition and GeForce GT 640M Mac Edition - video card comparison
GeForce GT 650M Mac Edition
GeForce GT 640M Mac Edition
Architecture
Kepler (2012−2018)
Kepler (2012−2018)
GPU code name
GK107
GK107
Market segment
Desktop
Desktop
Release date
July 2012
February 2013
Interface
PCIe 3.0 x16
PCIe 3.0 x16
Core clock speed
900 MHz
745 MHz
Floating-point performance
691.2 gflops
572.2 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
1,270 million
1,270 million
Pipelines / CUDA cores
384
384
Power consumption (TDP)
45 Watt
32 Watt
Texture fill rate
28.80
23.84
Memory type
GDDR5
GDDR5
Maximum RAM amount
512 MB
512 MB
Memory bus width
128 Bit
64 Bit
Memory clock speed
5016 MHz
5000 MHz
Memory bandwidth
80.26 GB/s
40 GB/s
Display Connectors
No outputs
No outputs
DirectX
12 (11_0)
12 (11_0)
CUDA
3.0
3.0
OpenCL
1.2
1.2
OpenGL
4.6
4.6
Shader Model
5.1
5.1
Vulkan
1.1.126
1.1.126