NVIDIA Tesla K20X vs NVIDIA Tesla K8

VS

NVIDIA Tesla K20X NVIDIA Tesla K8

We compared two Professional market GPUs: 6GB VRAM Tesla K20X and 8GB VRAM Tesla K8 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA Tesla K20X 's Advantages

Larger VRAM bandwidth (249.6GB/s vs 160.0GB/s)

1152 additional rendering cores

NVIDIA Tesla K8 's Advantages

Released 1 years and 10 months late

Boost Clock811MHz

More VRAM (8GB vs 6GB)

Lower TDP (100W vs 235W)

Score

Benchmark

FP32 (float)

Tesla K20X +57%

3.935 TFLOPS

Tesla K8

2.491 TFLOPS

Tesla K20X

VS

Tesla K8

Graphics Card

Nov 2012

Release Date

Sep 2014

Tesla

Generation

Tesla

Professional

Type

Professional

PCIe 3.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

Base Clock

693 MHz

-

Boost Clock

811 MHz

1300 MHz

Memory Clock

1250 MHz

Memory

6GB

Memory Size

8GB

GDDR5

Memory Type

GDDR5

384bit

Memory Bus

256bit

249.6GB/s

Bandwidth

160.0GB/s

Render Config

-

SM Count

-

Compute Units

-

2688

Shading Units

1536

224

TMUs

128

48

ROPs

32

-

Tensor Cores

-

RT Cores

-

16 KB (per SMX)

L1 Cache

16 KB (per SMX)

1536 KB

L2 Cache

512 KB

Theoretical Performance

40.99 GPixel/s

Pixel Rate

25.95 GPixel/s

164.0 GTexel/s

Texture Rate

103.8 GTexel/s

-

FP16 (half)

-

3.935 TFLOPS

FP32 (float)

2.491 TFLOPS

1312 GFLOPS

FP64 (double)

103.8 GFLOPS

Graphics Processor

GK110

GPU Name

GK104

-

GPU Variant

-

Kepler

Architecture

Kepler

TSMC

Foundry

TSMC

28 nm

Process Size

28 nm

7.08 billion

Transistors

3.54 billion

561 mm²

Die Size

294 mm²

Board Design

235W

TDP

100W

550 W

Suggested PSU

300 W

No outputs

Outputs

No outputs

1x 6-pin + 1x 8-pin

Power Connectors

1x 6-pin

Graphics Features

12 (11_0)

DirectX

12 (11_0)

4.6

OpenGL

4.6

3.0

OpenCL

3.0

1.1

Vulkan

1.1

3.5

CUDA

3.0

5.1

Shader Model

5.1

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