NVIDIA Tesla K40st vs NVIDIA Tesla K20X

VS

We compared two Professional market GPUs: 12GB VRAM Tesla K40st and 6GB VRAM Tesla K20X to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA Tesla K40st 's Advantages

Released 1 years late

More VRAM (12GB vs 6GB)

Larger VRAM bandwidth (288.4GB/s vs 249.6GB/s)

192 additional rendering cores

NVIDIA Tesla K20X 's Advantages

Lower TDP (235W vs 245W)

Score

Benchmark

FP32 (float)

Tesla K40st

3.312 TFLOPS

Tesla K20X +18%

3.935 TFLOPS

Tesla K40st

VS

Tesla K20X

Graphics Card

Nov 2013

Release Date

Nov 2012

Tesla

Generation

Tesla

Professional

Type

Professional

PCIe 3.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

-

Base Clock

-

Boost Clock

-

1502 MHz

Memory Clock

1300 MHz

Memory

12GB

Memory Size

6GB

GDDR5

Memory Type

GDDR5

384bit

Memory Bus

384bit

288.4GB/s

Bandwidth

249.6GB/s

Render Config

-

SM Count

-

Compute Units

-

2880

Shading Units

2688

240

TMUs

224

48

ROPs

48

-

Tensor Cores

-

RT Cores

-

16 KB (per SMX)

L1 Cache

16 KB (per SMX)

1536 KB

L2 Cache

1536 KB

Theoretical Performance

34.50 GPixel/s

Pixel Rate

40.99 GPixel/s

138.0 GTexel/s

Texture Rate

164.0 GTexel/s

-

FP16 (half)

-

3.312 TFLOPS

FP32 (float)

3.935 TFLOPS

1104 GFLOPS

FP64 (double)

1312 GFLOPS

Graphics Processor

GK110B

GPU Name

GK110

-

GPU Variant

-

Kepler

Architecture

Kepler

TSMC

Foundry

TSMC

28 nm

Process Size

28 nm

7.08 billion

Transistors

7.08 billion

561 mm²

Die Size

561 mm²

Board Design

245W

TDP

235W

550 W

Suggested PSU

550 W

No outputs

Outputs

No outputs

-

Power Connectors

1x 6-pin + 1x 8-pin

Graphics Features

12 (11_1)

DirectX

12 (11_0)

4.6

OpenGL

4.6

3.0

OpenCL

3.0

1.1

Vulkan

1.1

3.5

CUDA

3.5

5.1

Shader Model

5.1

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