NVIDIA GeForce RTX 3080 Ti 20 GB vs AMD Radeon RX 6900 XT

VS

NVIDIA GeForce RTX 3080 Ti 20 GB

AMD Radeon RX 6900 XT

We compared two Desktop platform GPUs: 20GB VRAM GeForce RTX 3080 Ti 20 GB and 16GB VRAM Radeon RX 6900 XT to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce RTX 3080 Ti 20 GB 's Advantages

Released 1 years and 3 months late

More VRAM (20GB vs 16GB)

Larger VRAM bandwidth (760.3GB/s vs 512.0GB/s)

5120 additional rendering cores

AMD Radeon RX 6900 XT 's Advantages

Boost Clock has increased by 35% (2250MHz vs 1665MHz)

Lower TDP (300W vs 350W)

Score

Benchmark

FP32 (float)

GeForce RTX 3080 Ti 20 GB +48%

34.1 TFLOPS

Radeon RX 6900 XT

23.04 TFLOPS

Blender

GeForce RTX 3080 Ti 20 GB +102%

5956

Radeon RX 6900 XT

2948

GeForce RTX 3080 Ti 20 GB

VS

Radeon RX 6900 XT

Graphics Card

Jan 2022

Release Date

Oct 2020

GeForce 30

Generation

Navi II

Desktop

Type

Desktop

PCIe 4.0 x16

Bus Interface

PCIe 4.0 x16

Clock Speeds

1335 MHz

Base Clock

1825 MHz

1665 MHz

Boost Clock

2250 MHz

1188 MHz

Memory Clock

2000 MHz

Memory

20GB

Memory Size

16GB

GDDR6X

Memory Type

GDDR6

320bit

Memory Bus

256bit

760.3GB/s

Bandwidth

512.0GB/s

Render Config

-

Compute Units

80

SM Count

-

10240

Shading Units

5120

320

TMUs

320

112

ROPs

128

320

Tensor Cores

-

80

RT Cores

80

128 KB (per SM)

L1 Cache

128 KB per Array

6 MB

L2 Cache

4 MB

-

L3 Cache

128 MB

Theoretical Performance

186.5 GPixel/s

Pixel Rate

288.0 GPixel/s

532.8 GTexel/s

Texture Rate

720.0 GTexel/s

34.10 TFLOPS

FP16 (half)

46.08 TFLOPS

34.10 TFLOPS

FP32 (float)

23.04 TFLOPS

532.8 GFLOPS

FP64 (double)

1440 GFLOPS

Board Design

350W

TDP

300W

750 W

Suggested PSU

700 W

1x HDMI 2.1 3x DisplayPort 1.4a

Outputs

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

1x 12-pin

Power Connectors

2x 8-pin

Graphics Processor

GA102

GPU Name

Navi 21

GA102-225-A1

GPU Variant

Navi 21 XTX (215-121000167)

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

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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