GeForce GT 640M Mac Edition and Radeon E4690 - video card comparison
GeForce GT 640M Mac Edition
Radeon E4690
Architecture
Kepler (2012−2018)
TeraScale (2005−2013)
GPU code name
GK107
RV730
Market segment
Desktop
Desktop
Release date
February 2013
June 2009
Interface
PCIe 3.0 x16
MXM-II
Core clock speed
745 MHz
600 MHz
Floating-point performance
572.2 gflops
384.0 gflops
Manufacturing process technology
28 nm
55 nm
Number of transistors
1,270 million
514 million
Pipelines / CUDA cores
384
320
Power consumption (TDP)
32 Watt
30 Watt
Texture fill rate
23.84
19.20
Memory type
GDDR5
GDDR3
Maximum RAM amount
512 MB
512 MB
Memory bus width
64 Bit
128 Bit
Memory clock speed
5000 MHz
1400 MHz
Memory bandwidth
40 GB/s
22.4 GB/s
Display Connectors
No outputs
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DirectX
12 (11_0)
10.1
CUDA
3.0
-
OpenCL
1.2
1.0
OpenGL
4.6
3.3
Shader Model
5.1
4.1
Vulkan
1.1.126
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