GeForce GT 640 Rev. 2 and Radeon R9 380 OEM - video card comparison
GeForce GT 640 Rev. 2
Radeon R9 380 OEM
Architecture
Kepler 2.0 (2013−2015)
GCN 3.0 (2014−2017)
GPU code name
GK208
Antigua
Market segment
Desktop
Desktop
Release date
May 2013
May 2015
Interface
PCIe 2.0 x8
PCIe 3.0 x16
Supplementary power connectors
None
2x 6-pin
Core clock speed
1046 MHz
918 MHz
Floating-point performance
803.3 gflops
3,290 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
915 million
5,000 million
Pipelines / CUDA cores
384
1792
Power consumption (TDP)
49 Watt
190 Watt
Texture fill rate
33.47
102.8
Memory type
GDDR5
GDDR5
Maximum RAM amount
1 GB
4 GB
Memory bus width
64 Bit
256 Bit
Memory clock speed
5008 MHz
5500 MHz
Memory bandwidth
40.06 GB/s
176.0 GB/s
Display Connectors
1x DVI, 1x HDMI, 1x VGA
2x DVI, 1x HDMI, 1x DisplayPort
HDMI
+
+
DirectX
12 (11_0)
12 (12_0)
CUDA
3.5
-
OpenCL
1.2
2.0
OpenGL
4.6
4.6
Shader Model
5.1
6.3
Vulkan
1.1.126
1.2.131