NVIDIA Tesla K20c vs NVIDIA Tesla P40

VS

NVIDIA Tesla K20c

NVIDIA Tesla P40

We compared two Professional market GPUs: 5GB VRAM Tesla K20c and 24GB VRAM Tesla P40 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA Tesla K20c 's Advantages

Lower TDP (225W vs 250W)

NVIDIA Tesla P40 's Advantages

Released 3 years and 10 months late

Boost Clock1531MHz

More VRAM (24GB vs 5GB)

Larger VRAM bandwidth (347.1GB/s vs 208.0GB/s)

1344 additional rendering cores

Score

Benchmark

FP32 (float)

Tesla K20c

3.524 TFLOPS

Tesla P40 +233%

11.76 TFLOPS

OctaneBench

Tesla K20c

55

Tesla P40 +201%

166

Tesla K20c

VS

Tesla P40

Graphics Card

Nov 2012

Release Date

Sep 2016

Tesla

Generation

Tesla Pascal

Professional

Type

Professional

PCIe 2.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

-

Base Clock

1303 MHz

-

Boost Clock

1531 MHz

1300 MHz

Memory Clock

1808 MHz

Memory

5GB

Memory Size

24GB

GDDR5

Memory Type

GDDR5

320bit

Memory Bus

384bit

208.0GB/s

Bandwidth

347.1GB/s

Render Config

-

SM Count

30

2496

Shading Units

3840

208

TMUs

240

40

ROPs

96

-

16 KB (per SMX)

L1 Cache

48 KB (per SM)

1280 KB

L2 Cache

3 MB

-

Theoretical Performance

36.71 GPixel/s

Pixel Rate

147.0 GPixel/s

146.8 GTexel/s

Texture Rate

367.4 GTexel/s

-

FP16 (half)

183.7 GFLOPS

3.524 TFLOPS

FP32 (float)

11.76 TFLOPS

1175 GFLOPS

FP64 (double)

367.4 GFLOPS

Board Design

225W

TDP

250W

550 W

Suggested PSU

600 W

No outputs

Outputs

No outputs

1x 6-pin + 1x 8-pin

Power Connectors

8-pin EPS

Graphics Processor

GK110

GPU Name

GP102

GK110-885-KA-A1

GPU Variant

-

Kepler

Architecture

Pascal

TSMC

Foundry

TSMC

28 nm

Process Size

16 nm

7.08 billion

Transistors

11.8 billion

561 mm²

Die Size

471 mm²

Graphics Features

12 (11_0)

DirectX

12 (12_1)

4.6

OpenGL

4.6

3.0

OpenCL

3.0

1.1

Vulkan

1.3

3.5

CUDA

6.1

5.1

Shader Model

6.7

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