NVIDIA Tesla K20X vs NVIDIA Tesla S870

VS

NVIDIA Tesla K20X

NVIDIA Tesla S870

We compared two Professional market GPUs: 6GB VRAM Tesla K20X and 1536MB VRAM Tesla S870 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA Tesla K20X 's Advantages

Released 5 years and 6 months late

More VRAM (6GB vs 1536GB)

Larger VRAM bandwidth (249.6GB/s vs 76.80GB/s)

2560 additional rendering cores

Lower TDP (235W vs 800W)

Score

Benchmark

FP32 (float)

Tesla K20X +1037%

3.935 TFLOPS

Tesla S870

0.346 TFLOPS

Tesla K20X

VS

Tesla S870

Graphics Card

Nov 2012

Release Date

May 2007

Tesla

Generation

Tesla

Professional

Type

Professional

PCIe 3.0 x16

Bus Interface

PCIe 1.0 x16

Clock Speeds

-

1300 MHz

Memory Clock

800 MHz

Memory

6GB

Memory Size

1536MB

GDDR5

Memory Type

GDDR3

384bit

Memory Bus

384bit

249.6GB/s

Bandwidth

76.80GB/s

Render Config

-

SM Count

16

2688

Shading Units

128

224

TMUs

32

48

ROPs

24

-

16 KB (per SMX)

L1 Cache

-

1536 KB

L2 Cache

96 KB

-

Theoretical Performance

40.99 GPixel/s

Pixel Rate

14.40 GPixel/s

164.0 GTexel/s

Texture Rate

38.40 GTexel/s

-

3.935 TFLOPS

FP32 (float)

345.6 GFLOPS

1312 GFLOPS

FP64 (double)

-

Board Design

235W

TDP

800W

550 W

Suggested PSU

1200 W

No outputs

Outputs

No outputs

1x 6-pin + 1x 8-pin

Power Connectors

-

Graphics Processor

GK110

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_0)

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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