Radeon E8860 and GeForce GT 640 Rev. 2 - video card comparison
Radeon E8860
GeForce GT 640 Rev. 2
Architecture
GCN 1.0 (2012−2020)
Kepler 2.0 (2013−2015)
GPU code name
Venus
GK208
Market segment
Desktop
Desktop
Release date
January 2014
May 2013
Interface
PCIe 3.0 x16
PCIe 2.0 x8
Supplementary power connectors
-
None
Boost clock speed
625 MHz
-
Core clock speed
575 MHz
1046 MHz
Floating-point performance
800.0 gflops
803.3 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
1,500 million
915 million
Pipelines / CUDA cores
640
384
Power consumption (TDP)
37 Watt
49 Watt
Texture fill rate
25.00
33.47
Memory type
GDDR5
GDDR5
Maximum RAM amount
2 GB
1 GB
Memory bus width
128 Bit
64 Bit
Memory clock speed
4500 MHz
5008 MHz
Memory bandwidth
72 GB/s
40.06 GB/s
Display Connectors
4x mini-DisplayPort
1x DVI, 1x HDMI, 1x VGA
HDMI
-
+
DirectX
12 (11_1)
12 (11_0)
CUDA
-
3.5
OpenCL
1.2
1.2
OpenGL
4.6
4.6
Shader Model
5.1
5.1
Vulkan
1.2.131
1.1.126