NVIDIA Tesla K20c vs NVIDIA RTX A4000

VS

We compared two Professional market GPUs: 5GB VRAM Tesla K20c and 16GB VRAM RTX A4000 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA RTX A4000 's Advantages

Released 8 years and 5 months late

Boost Clock1560MHz

More VRAM (16GB vs 5GB)

Larger VRAM bandwidth (448.0GB/s vs 208.0GB/s)

3648 additional rendering cores

Lower TDP (140W vs 225W)

Score

Benchmark

FP32 (float)

Tesla K20c

3.524 TFLOPS

RTX A4000 +443%

19.17 TFLOPS

OctaneBench

Tesla K20c

55

RTX A4000 +536%

350

Tesla K20c

VS

RTX A4000

Graphics Card

Nov 2012

Release Date

Apr 2021

Tesla

Generation

Quadro Ampere

Professional

Type

Professional

PCIe 2.0 x16

Bus Interface

PCIe 4.0 x16

Clock Speeds

-

Base Clock

735 MHz

-

Boost Clock

1560 MHz

1300 MHz

Memory Clock

1750 MHz

Memory

5GB

Memory Size

16GB

GDDR5

Memory Type

GDDR6

320bit

Memory Bus

256bit

208.0GB/s

Bandwidth

448.0GB/s

Render Config

-

SM Count

48

-

Compute Units

-

2496

Shading Units

6144

208

TMUs

192

40

ROPs

96

-

Tensor Cores

192

-

RT Cores

48

16 KB (per SMX)

L1 Cache

128 KB (per SM)

1280 KB

L2 Cache

4 MB

Theoretical Performance

36.71 GPixel/s

Pixel Rate

149.8 GPixel/s

146.8 GTexel/s

Texture Rate

299.5 GTexel/s

-

FP16 (half)

19.17 TFLOPS

3.524 TFLOPS

FP32 (float)

19.17 TFLOPS

1175 GFLOPS

FP64 (double)

299.5 GFLOPS

Graphics Processor

GK110

GPU Name

GA104

GK110-885-KA-A1

GPU Variant

GA104-875-A1

Kepler

Architecture

Ampere

TSMC

Foundry

Samsung

28 nm

Process Size

8 nm

7.08 billion

Transistors

17.4 billion

561 mm²

Die Size

392 mm²

Board Design

225W

TDP

140W

550 W

Suggested PSU

300 W

No outputs

Outputs

4x DisplayPort 1.4a

1x 6-pin + 1x 8-pin

Power Connectors

1x 6-pin

Graphics Features

12 (11_0)

DirectX

12 Ultimate (12_2)

4.6

OpenGL

4.6

3.0

OpenCL

3.0

1.1

Vulkan

1.3

3.5

CUDA

8.6

5.1

Shader Model

6.7

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