Radeon HD 3450 and GeForce GT 640M Mac Edition - video card comparison
Radeon HD 3450
GeForce GT 640M Mac Edition
Architecture
TeraScale (2005−2013)
Kepler (2012−2018)
GPU code name
RV620
GK107
Market segment
Desktop
Desktop
Release date
December 2007
February 2013
Interface
PCIe 2.0 x16
PCIe 3.0 x16
Supplementary power connectors
None
-
Core clock speed
600 MHz
745 MHz
Floating-point performance
48 gflops
572.2 gflops
Manufacturing process technology
55 nm
28 nm
Number of transistors
181 million
1,270 million
Pipelines / CUDA cores
40
384
Power consumption (TDP)
25 Watt
32 Watt
Texture fill rate
2.400
23.84
Memory type
DDR2
GDDR5
Maximum RAM amount
256 MB
512 MB
Memory bus width
64 Bit
64 Bit
Memory clock speed
1000 MHz
5000 MHz
Memory bandwidth
8 GB/s
40 GB/s
Display Connectors
1x DVI, 1x VGA, 1x S-Video
No outputs
DirectX
10.1 (10_1)
12 (11_0)
CUDA
-
3.0
OpenCL
N/A
1.2
OpenGL
3.3
4.6
Shader Model
4.1
5.1
Vulkan
N/A
1.1.126