NVIDIA Tesla K40s vs NVIDIA Tesla C870

VS

NVIDIA Tesla K40s

NVIDIA Tesla C870

We compared two Professional market GPUs: 12GB VRAM Tesla K40s and 1536MB VRAM Tesla C870 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA Tesla K40s 's Advantages

Released 6 years and 6 months late

Boost Clock876MHz

More VRAM (12GB vs 1536GB)

Larger VRAM bandwidth (288.4GB/s vs 76.80GB/s)

2752 additional rendering cores

NVIDIA Tesla C870 's Advantages

Lower TDP (171W vs 245W)

Score

Benchmark

FP32 (float)

Tesla K40s +1358%

5.046 TFLOPS

Tesla C870

0.346 TFLOPS

Tesla K40s

VS

Tesla C870

Graphics Card

Nov 2013

Release Date

May 2007

Tesla

Generation

Tesla

Professional

Type

Professional

PCIe 3.0 x16

Bus Interface

PCIe 1.0 x16

Clock Speeds

745 MHz

Base Clock

-

876 MHz

Boost Clock

-

1502 MHz

Memory Clock

800 MHz

Memory

12GB

Memory Size

1536MB

GDDR5

Memory Type

GDDR3

384bit

Memory Bus

384bit

288.4GB/s

Bandwidth

76.80GB/s

Render Config

-

SM Count

16

2880

Shading Units

128

240

TMUs

32

48

ROPs

24

-

16 KB (per SMX)

L1 Cache

-

1536 KB

L2 Cache

96 KB

-

Theoretical Performance

52.56 GPixel/s

Pixel Rate

14.40 GPixel/s

210.2 GTexel/s

Texture Rate

38.40 GTexel/s

-

5.046 TFLOPS

FP32 (float)

345.6 GFLOPS

1.682 TFLOPS

FP64 (double)

-

Board Design

245W

TDP

171W

550 W

Suggested PSU

450 W

No outputs

Outputs

No outputs

-

Power Connectors

2x 6-pin

Graphics Processor

GK110B

GPU Name

G80

-

Kepler

Architecture

Tesla

TSMC

Foundry

TSMC

28 nm

Process Size

90 nm

7.08 billion

Transistors

0.681 billion

561 mm²

Die Size

484 mm²

Graphics Features

12 (11_1)

DirectX

11.1 (10_0)

4.6

OpenGL

3.3

3.0

OpenCL

1.1 (1.0)

1.1

Vulkan

N/A

3.5

CUDA

1.0

5.1

Shader Model

4.0

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