Radeon E8950 and GeForce GT 640 Rev. 2 - video card comparison
Radeon E8950
GeForce GT 640 Rev. 2
Architecture
GCN 3.0 (2014−2017)
Kepler 2.0 (2013−2015)
GPU code name
Amethyst
GK208
Market segment
Desktop
Desktop
Release date
September 2015
May 2013
Interface
MXM-B (3.0)
PCIe 2.0 x8
Supplementary power connectors
None
None
Boost clock speed
1000 MHz
-
Core clock speed
735 MHz
1046 MHz
Floating-point performance
4,096 gflops
803.3 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
5,000 million
915 million
Pipelines / CUDA cores
2048
384
Power consumption (TDP)
95 Watt
49 Watt
Texture fill rate
128.0
33.47
Memory type
GDDR5
GDDR5
Maximum RAM amount
8 GB
1 GB
Memory bus width
256 Bit
64 Bit
Memory clock speed
6000 MHz
5008 MHz
Memory bandwidth
192.0 GB/s
40.06 GB/s
Display Connectors
No outputs
1x DVI, 1x HDMI, 1x VGA
HDMI
-
+
DirectX
12 (12_0)
12 (11_0)
CUDA
-
3.5
OpenCL
2.0
1.2
OpenGL
4.6
4.6
Shader Model
6.3
5.1
Vulkan
1.2.131
1.1.126