
Tesla K20c and Tesla M40 - video card comparison
Tesla K20c
Tesla M40
Architecture
Kepler (2012−2018)
Maxwell 2.0 (2015−2019)
GPU code name
GK110
GM200
Market segment
Workstation
Workstation
Release date
November 2012
November 2015
Interface
PCIe 2.0 x16
PCIe 3.0 x16
Supplementary power connectors
1x 6-pin + 1x 8-pin
8-pin EPS
Boost clock speed
-
1112 MHz
Core clock speed
706 MHz
948 MHz
Floating-point performance
3,524 gflops
6,844 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
7,080 million
8,000 million
Pipelines / CUDA cores
2496
3072
Power consumption (TDP)
225 Watt
250 Watt
Texture fill rate
146.8
213.5
Memory type
GDDR5
GDDR5
Maximum RAM amount
5 GB
12 GB
Memory bus width
320 Bit
384 Bit
Memory clock speed
5200 MHz
6 GB/s
Memory bandwidth
208.0 GB/s
288.4 GB/s
Display Connectors
No outputs
No outputs
DirectX
12 (11_0)
12 (12_1)
CUDA
3.5
5.2
OpenCL
1.2
3.0
OpenGL
4.6
4.6
Shader Model
5.1
6.7
Vulkan
1.1.126
1.3