GeForce GT 640M Mac Edition and Radeon X1550 - video card comparison
GeForce GT 640M Mac Edition
Radeon X1550
Architecture
Kepler (2012−2018)
Ultra-Threaded SE
GPU code name
GK107
RV516
Market segment
Desktop
Desktop
Release date
February 2013
2007
Interface
PCIe 3.0 x16
PCIe 1.0 x16
Supplementary power connectors
-
None
Core clock speed
745 MHz
550 MHz
Floating-point performance
572.2 gflops
-
Manufacturing process technology
28 nm
90 nm
Number of transistors
1,270 million
105 million
Pipelines / CUDA cores
384
-
Power consumption (TDP)
32 Watt
27 Watt
Texture fill rate
23.84
2.200
Memory type
GDDR5
DDR2
Maximum RAM amount
512 MB
256 MB
Memory bus width
64 Bit
128 Bit
Memory clock speed
5000 MHz
800 MBps
Memory bandwidth
40 GB/s
12.8 GB/s
Display Connectors
No outputs
1x DVI, 1x VGA, 1x S-Video
DirectX
12 (11_0)
9.0c (9_3)
CUDA
3.0
-
OpenCL
1.2
N/A
OpenGL
4.6
2.1
Shader Model
5.1
3.0
Vulkan
1.1.126
N/A