GeForce GT 640 OEM and GeForce 8600 GT Mac Edition - video card comparison
GeForce GT 640 OEM
GeForce 8600 GT Mac Edition
Architecture
Kepler (2012−2018)
Tesla (2006−2010)
GPU code name
GK107
G84
Market segment
Desktop
Desktop
Release date
April 2012
April 2007
Interface
PCIe 3.0 x16
PCIe 1.0 x16
Supplementary power connectors
None
None
Core clock speed
797 MHz
600 MHz
Floating-point performance
612.1 gflops
92.8 gflops
Manufacturing process technology
28 nm
80 nm
Number of transistors
1,270 million
289 million
Pipelines / CUDA cores
384
32
Power consumption (TDP)
50 Watt
47 Watt
Texture fill rate
25.50
9.600
Memory type
DDR3
GDDR3
Maximum RAM amount
2 GB
128 MB
Memory bus width
128 Bit
128 Bit
Memory clock speed
1782 MHz
1500 MHz
Memory bandwidth
28.51 GB/s
24 GB/s
Display Connectors
1x DVI, 1x HDMI, 1x DisplayPort
2x DVI
HDMI
+
-
DirectX
12 (11_0)
11.1 (10_0)
CUDA
3.0
1.1
OpenCL
1.2
1.1
OpenGL
4.6
3.3
Shader Model
5.1
4.0
Vulkan
1.1.126
N/A