NVIDIA Tesla C870 vs NVIDIA Tesla K20X

VS

We compared two Professional market GPUs: 1536MB VRAM Tesla C870 and 6GB VRAM Tesla K20X to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA Tesla C870 's Advantages

Lower TDP (171W vs 235W)

NVIDIA Tesla K20X 's Advantages

Released 5 years and 6 months late

More VRAM (6GB vs 1GB)

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

2560 additional rendering cores

Score

Benchmark

FP32 (float)

Tesla C870

0.346 TFLOPS

Tesla K20X +1037%

3.935 TFLOPS

Tesla C870

VS

Tesla K20X

Graphics Card

May 2007

Release Date

Nov 2012

Tesla

Generation

Tesla

Professional

Type

Professional

PCIe 1.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

-

Base Clock

-

Boost Clock

-

800 MHz

Memory Clock

1300 MHz

Memory

1536MB

Memory Size

6GB

GDDR3

Memory Type

GDDR5

384bit

Memory Bus

384bit

76.80GB/s

Bandwidth

249.6GB/s

Render Config

16

SM Count

-

Compute Units

-

128

Shading Units

2688

32

TMUs

224

24

ROPs

48

-

Tensor Cores

-

RT Cores

-

L1 Cache

16 KB (per SMX)

96 KB

L2 Cache

1536 KB

Theoretical Performance

14.40 GPixel/s

Pixel Rate

40.99 GPixel/s

38.40 GTexel/s

Texture Rate

164.0 GTexel/s

-

FP16 (half)

-

345.6 GFLOPS

FP32 (float)

3.935 TFLOPS

-

FP64 (double)

1312 GFLOPS

Graphics Processor

G80

GPU Name

GK110

-

GPU Variant

-

Tesla

Architecture

Kepler

TSMC

Foundry

TSMC

90 nm

Process Size

28 nm

0.681 billion

Transistors

7.08 billion

484 mm²

Die Size

561 mm²

Board Design

171W

TDP

235W

450 W

Suggested PSU

550 W

No outputs

Outputs

No outputs

2x 6-pin

Power Connectors

1x 6-pin + 1x 8-pin

Graphics Features

11.1 (10_0)

DirectX

12 (11_0)

3.3

OpenGL

4.6

1.1 (1.0)

OpenCL

3.0

N/A

Vulkan

1.1

1.0

CUDA

3.5

4.0

Shader Model

5.1

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