NVIDIA Tesla K8 vs NVIDIA Tesla K40s

VS

NVIDIA Tesla K8

NVIDIA Tesla K40s

We compared two Professional market GPUs: 8GB VRAM Tesla K8 and 12GB VRAM Tesla K40s to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA Tesla K8 's Advantages

Released 10 months late

Lower TDP (100W vs 245W)

NVIDIA Tesla K40s 's Advantages

Boost Clock has increased by 8% (876MHz vs 811MHz)

More VRAM (12GB vs 8GB)

Larger VRAM bandwidth (288.4GB/s vs 160.0GB/s)

1344 additional rendering cores

Score

Benchmark

FP32 (float)

Tesla K8

2.491 TFLOPS

Tesla K40s +102%

5.046 TFLOPS

Tesla K8

VS

Tesla K40s

Graphics Card

Sep 2014

Release Date

Nov 2013

Tesla

Generation

Tesla

Professional

Type

Professional

PCIe 2.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

693 MHz

Base Clock

745 MHz

811 MHz

Boost Clock

876 MHz

1250 MHz

Memory Clock

1502 MHz

Memory

8GB

Memory Size

12GB

GDDR5

Memory Type

GDDR5

256bit

Memory Bus

384bit

160.0GB/s

Bandwidth

288.4GB/s

Render Config

-

1536

Shading Units

2880

128

TMUs

240

32

ROPs

48

-

16 KB (per SMX)

L1 Cache

16 KB (per SMX)

512 KB

L2 Cache

1536 KB

-

Theoretical Performance

25.95 GPixel/s

Pixel Rate

52.56 GPixel/s

103.8 GTexel/s

Texture Rate

210.2 GTexel/s

-

2.491 TFLOPS

FP32 (float)

5.046 TFLOPS

103.8 GFLOPS

FP64 (double)

1.682 TFLOPS

Board Design

100W

TDP

245W

300 W

Suggested PSU

550 W

No outputs

Outputs

No outputs

1x 6-pin

Power Connectors

-

Graphics Processor

GK104

GPU Name

GK110B

-

Kepler

Architecture

Kepler

TSMC

Foundry

TSMC

28 nm

Process Size

28 nm

3.54 billion

Transistors

7.08 billion

294 mm²

Die Size

561 mm²

Graphics Features

12 (11_0)

DirectX

12 (11_1)

4.6

OpenGL

4.6

3.0

OpenCL

3.0

1.1

Vulkan

1.1

3.0

CUDA

3.5

5.1

Shader Model

5.1

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