GeForce GT 640 and Radeon R5 340X OEM - video card comparison
GeForce GT 640
Radeon R5 340X OEM
Architecture
Kepler (2012−2018)
GCN 1.0 (2012−2020)
GPU code name
GK107
Oland
Market segment
Desktop
Desktop
Release date
June 2012
May 2015
Interface
PCIe 3.0 x16
PCIe 3.0 x8
Supplementary power connectors
None
None
Boost clock speed
-
1050 MHz
Core clock speed
902 MHz
900 MHz
Floating-point performance
692.7 gflops
806.4 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
1,270 million
950 million
Pipelines / CUDA cores
384
384
Power consumption (TDP)
65 Watt
65 Watt
Texture fill rate
28.86
21.60
Memory type
DDR3
DDR3
Maximum RAM amount
2 GB
2 GB
Memory bus width
128 Bit
64 Bit
Memory clock speed
1782 MHz
2000 MHz
Memory bandwidth
28.51 GB/s
16 GB/s
Display Connectors
1x DVI, 1x HDMI, 1x DisplayPort
1x DVI, 1x DisplayPort
HDMI
+
-
DirectX
12 (11_0)
12 (11_1)
CUDA
3.0
-
OpenCL
1.2
1.2
OpenGL
4.6
4.6
Shader Model
5.1
5.1
Vulkan
1.1.126
1.2.131