Radeon HD 3850 AGP and GeForce GT 640M Mac Edition - video card comparison
Radeon HD 3850 AGP
GeForce GT 640M Mac Edition
Architecture
TeraScale (2005−2013)
Kepler (2012−2018)
GPU code name
RV670
GK107
Market segment
Desktop
Desktop
Release date
January 2008
February 2013
Interface
AGP 8x
PCIe 3.0 x16
Supplementary power connectors
1x 8-pin
-
Core clock speed
668 MHz
745 MHz
Floating-point performance
427.5 gflops
572.2 gflops
Manufacturing process technology
55 nm
28 nm
Number of transistors
666 million
1,270 million
Pipelines / CUDA cores
320
384
Power consumption (TDP)
75 Watt
32 Watt
Texture fill rate
10.69
23.84
Memory type
GDDR3
GDDR5
Maximum RAM amount
512 MB
512 MB
Memory bus width
256 Bit
64 Bit
Memory clock speed
1656 MHz
5000 MHz
Memory bandwidth
52.99 GB/s
40 GB/s
Display Connectors
2x DVI, 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