Tesla K40c and Tesla K20X - video card comparison
Tesla K40c
Tesla K20X
Architecture
Kepler (2012−2018)
Kepler (2012−2018)
GPU code name
GK180
GK110
Market segment
Workstation
Workstation
Release date
October 2013
November 2012
Interface
PCIe 3.0 x16
PCIe 3.0 x16
Supplementary power connectors
1x 6-pin + 1x 8-pin
1x 6-pin + 1x 8-pin
Boost clock speed
876 MHz
-
Core clock speed
745 MHz
732 MHz
Floating-point performance
4,291 gflops
3,935 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
7,080 million
7,080 million
Pipelines / CUDA cores
2880
2688
Power consumption (TDP)
245 Watt
235 Watt
Texture fill rate
210.2
164.0
Memory type
GDDR5
GDDR5
Maximum RAM amount
12 GB
6 GB
Memory bus width
384 Bit
384 Bit
Memory clock speed
6008 MHz
5200 MHz
Memory bandwidth
288.4 GB/s
249.6 GB/s
Display Connectors
No outputs
No outputs
DirectX
12 (11_0)
12 (11_0)
CUDA
3.5
3.5
OpenCL
1.2
1.2
OpenGL
4.6
4.6
Shader Model
5.1
5.1
Vulkan
1.1.103
1.1.126