NVIDIA Tesla K20Xm vs NVIDIA Tesla M40

VS

NVIDIA Tesla K20Xm

NVIDIA Tesla M40

We compared two Professional market GPUs: 6GB VRAM Tesla K20Xm and 12GB VRAM Tesla M40 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA Tesla K20Xm 's Advantages

Lower TDP (235W vs 250W)

NVIDIA Tesla M40 's Advantages

Released 3 years late

Boost Clock1112MHz

More VRAM (12GB vs 6GB)

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

384 additional rendering cores

Score

Benchmark

FP32 (float)

Tesla K20Xm

3.935 TFLOPS

Tesla M40 +73%

6.832 TFLOPS

Blender

Tesla K20Xm +250%

372

Tesla M40

106

OctaneBench

Tesla K20Xm

63

Tesla M40 +95%

123

Tesla K20Xm

VS

Tesla M40

Graphics Card

Nov 2012

Release Date

Nov 2015

Tesla

Generation

Tesla Maxwell

Professional

Type

Professional

PCIe 3.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

-

Base Clock

948 MHz

-

Boost Clock

1112 MHz

1300 MHz

Memory Clock

1502 MHz

Memory

6GB

Memory Size

12GB

GDDR5

Memory Type

GDDR5

384bit

Memory Bus

384bit

249.6GB/s

Bandwidth

288.4GB/s

Render Config

-

2688

Shading Units

3072

224

TMUs

192

48

ROPs

96

-

16 KB (per SMX)

L1 Cache

48 KB (per SMM)

1536 KB

L2 Cache

3 MB

-

Theoretical Performance

40.99 GPixel/s

Pixel Rate

106.8 GPixel/s

164.0 GTexel/s

Texture Rate

213.5 GTexel/s

-

3.935 TFLOPS

FP32 (float)

6.832 TFLOPS

1312 GFLOPS

FP64 (double)

213.5 GFLOPS

Board Design

235W

TDP

250W

550 W

Suggested PSU

600 W

No outputs

Outputs

No outputs

-

Power Connectors

8-pin EPS

Graphics Processor

GK110

GPU Name

GM200

-

GPU Variant

GM200-895-A1

Kepler

Architecture

Maxwell 2.0

TSMC

Foundry

TSMC

28 nm

Process Size

28 nm

7.08 billion

Transistors

8 billion

561 mm²

Die Size

601 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

5.2

5.1

Shader Model

6.7

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