Radeon R7 250E and GeForce GT 640 Rev. 2 - video card comparison
Radeon R7 250E
GeForce GT 640 Rev. 2
Architecture
GCN 1.0 (2012−2020)
Kepler 2.0 (2013−2015)
GPU code name
Cape Verde
GK208
Market segment
Desktop
Desktop
Release date
December 2013
May 2013
Interface
PCIe 3.0 x16
PCIe 2.0 x8
Supplementary power connectors
None
None
Core clock speed
800 MHz
1046 MHz
Floating-point performance
819.2 gflops
803.3 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
1,500 million
915 million
Pipelines / CUDA cores
512
384
Power consumption (TDP)
55 Watt
49 Watt
Texture fill rate
25.60
33.47
Memory type
GDDR5
GDDR5
Maximum RAM amount
1 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
1x DVI, 1x HDMI, 1x 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