Radeon HD 6450 GDDR5 and GeForce GT 640M Mac Edition - video card comparison
Radeon HD 6450 GDDR5
GeForce GT 640M Mac Edition
Architecture
Terascale 2 (2009−2015)
Kepler (2012−2018)
GPU code name
Caicos
GK107
Market segment
Desktop
Desktop
Release date
April 2011
February 2013
Interface
-
PCIe 3.0 x16
Core clock speed
750 MHz
745 MHz
Floating-point performance
-
572.2 gflops
Manufacturing process technology
40 nm
28 nm
Number of transistors
-
1,270 million
Pipelines / CUDA cores
160
384
Power consumption (TDP)
27 Watt
32 Watt
Texture fill rate
-
23.84
Memory type
GDDR5
GDDR5
Maximum RAM amount
1 GB
512 MB
Memory bus width
64 Bit
64 Bit
Memory clock speed
900 MHz
5000 MHz
Memory bandwidth
-
40 GB/s
Shared memory
-
-
Display Connectors
-
No outputs
DirectX
11
12 (11_0)
CUDA
-
3.0
OpenCL
-
1.2
OpenGL
-
4.6
Shader Model
-
5.1
Vulkan
-
1.1.126