Tesla K40m and Tesla K20s - video card comparison

Tesla K40m

Tesla K20s

Architecture

Kepler (2012−2018)

Kepler (2012−2018)

GPU code name

GK110B

GK110

Market segment

Workstation

Workstation

Release date

November 2013

February 2013

Interface

PCIe 3.0 x16

PCIe 2.0 x16

Boost clock speed

876 MHz

-

Core clock speed

745 MHz

575 MHz

Floating-point performance

4,291 gflops

3,524 gflops

Manufacturing process technology

28 nm

28 nm

Number of transistors

7,080 million

7,080 million

Pipelines / CUDA cores

2880

2496

Power consumption (TDP)

245 Watt

225 Watt

Texture fill rate

210.2

119.6

Memory type

GDDR5

GDDR5

Maximum RAM amount

12 GB

5 GB

Memory bus width

384 Bit

320 Bit

Memory clock speed

6008 MHz

5200 MHz

Memory bandwidth

288.4 GB/s

208.0 GB/s

Display Connectors

No outputs

No outputs

DirectX

12 (11_1)

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

1.1.126

1.1.126