NVIDIA A40 PCIe vs AMD Radeon RX 6800 XT

VS

We compared two Desktop platform GPUs: 48GB VRAM A40 PCIe and 16GB VRAM Radeon RX 6800 XT to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA A40 PCIe 's Advantages

More VRAM (48GB vs 16GB)

Larger VRAM bandwidth (695.8GB/s vs 512.0GB/s)

6144 additional rendering cores

AMD Radeon RX 6800 XT 's Advantages

Boost Clock has increased by 29% (2250MHz vs 1740MHz)

Score

Benchmark

FP32 (float)

A40 PCIe +80%

37.42 TFLOPS

Radeon RX 6800 XT

20.74 TFLOPS

Blender

A40 PCIe +57%

4170

Radeon RX 6800 XT

2647

A40 PCIe

VS

Radeon RX 6800 XT

Graphics Card

Oct 2020

Release Date

Oct 2020

Tesla

Generation

Navi II

Desktop

Type

Desktop

PCIe 4.0 x16

Bus Interface

PCIe 4.0 x16

Clock Speeds

1305 MHz

Base Clock

1825 MHz

1740 MHz

Boost Clock

2250 MHz

1812 MHz

Memory Clock

2000 MHz

Memory

48GB

Memory Size

16GB

GDDR6

Memory Type

GDDR6

384bit

Memory Bus

256bit

695.8GB/s

Bandwidth

512.0GB/s

Render Config

84

SM Count

-

Compute Units

72

10752

Shading Units

4608

336

TMUs

288

112

ROPs

128

336

Tensor Cores

-

84

RT Cores

72

128 KB (per SM)

L1 Cache

128 KB per Array

6 MB

L2 Cache

4 MB

Theoretical Performance

194.9 GPixel/s

Pixel Rate

288.0 GPixel/s

584.6 GTexel/s

Texture Rate

648.0 GTexel/s

37.42 TFLOPS

FP16 (half)

41.47 TFLOPS

37.42 TFLOPS

FP32 (float)

20.74 TFLOPS

584.6 GFLOPS

FP64 (double)

1296 GFLOPS

Graphics Processor

GA102

GPU Name

Navi 21

-

GPU Variant

Navi 21 XT (215-121000177)

Ampere

Architecture

RDNA 2.0

Samsung

Foundry

TSMC

8 nm

Process Size

7 nm

28.3 billion

Transistors

26.8 billion

628 mm²

Die Size

520 mm²

Board Design

300W

TDP

300W

700 W

Suggested PSU

700 W

3x DisplayPort 1.4a

Outputs

1x HDMI 2.1 2x DisplayPort 1.4a 1x USB Type-C

8-pin EPS

Power Connectors

2x 8-pin

Graphics Features

12 Ultimate (12_2)

DirectX

12 Ultimate (12_2)

4.6

OpenGL

4.6

3.0

OpenCL

2.1

1.3

Vulkan

1.3

8.6

CUDA

-

6.6

Shader Model

6.5

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