GeForce GT 640M Mac Edition and Radeon X800 GTO - video card comparison
GeForce GT 640M Mac Edition
Radeon X800 GTO
Architecture
Kepler (2012−2018)
R400 (2004−2008)
GPU code name
GK107
R423
Market segment
Desktop
Desktop
Release date
February 2013
December 2007
Interface
PCIe 3.0 x16
PCIe 1.0 x16
Supplementary power connectors
-
None
Core clock speed
745 MHz
400 MHz
Floating-point performance
572.2 gflops
-
Manufacturing process technology
28 nm
130 nm
Number of transistors
1,270 million
160 million
Pipelines / CUDA cores
384
-
Power consumption (TDP)
32 Watt
49 Watt
Texture fill rate
23.84
4.800
Memory type
GDDR5
DDR
Maximum RAM amount
512 MB
128 MB
Memory bus width
64 Bit
256 Bit
Memory clock speed
5000 MHz
700 MHz
Memory bandwidth
40 GB/s
22.4 GB/s
Display Connectors
No outputs
1x DVI, 1x VGA, 1x S-Video
DirectX
12 (11_0)
9.0b (9_2)
CUDA
3.0
-
OpenCL
1.2
N/A
OpenGL
4.6
2.0
Shader Model
5.1
-
Vulkan
1.1.126
N/A