Tesla K20c and Tesla K40m - video card comparison

Tesla K20c

Tesla K40m

Architecture

Kepler (2012−2018)

Kepler (2012−2018)

GPU code name

GK110

GK110B

Market segment

Workstation

Workstation

Release date

November 2012

November 2013

Interface

PCIe 2.0 x16

PCIe 3.0 x16

Supplementary power connectors

1x 6-pin + 1x 8-pin

-

Boost clock speed

-

876 MHz

Core clock speed

706 MHz

745 MHz

Floating-point performance

3,524 gflops

4,291 gflops

Manufacturing process technology

28 nm

28 nm

Number of transistors

7,080 million

7,080 million

Pipelines / CUDA cores

2496

2880

Power consumption (TDP)

225 Watt

245 Watt

Texture fill rate

146.8

210.2

Memory type

GDDR5

GDDR5

Maximum RAM amount

5 GB

12 GB

Memory bus width

320 Bit

384 Bit

Memory clock speed

5200 MHz

6008 MHz

Memory bandwidth

208.0 GB/s

288.4 GB/s

Display Connectors

No outputs

No outputs

DirectX

12 (11_0)

12 (11_1)

CUDA

3.5

3.5

OpenCL

1.2

1.2

OpenGL

4.6

4.6

Shader Model

5.1

5.1

Vulkan

1.1.126

1.1.126