NVIDIA GeForce RTX 3090 vs AMD Radeon RX 6900 XTX

VS

NVIDIA GeForce RTX 3090 AMD Radeon RX 6900 XTX

We compared two Desktop platform GPUs: 24GB VRAM GeForce RTX 3090 and 16GB VRAM Radeon RX 6900 XTX to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce RTX 3090 's Advantages

More VRAM (24GB vs 16GB)

Larger VRAM bandwidth (936.2GB/s vs 576.0GB/s)

5376 additional rendering cores

AMD Radeon RX 6900 XTX 's Advantages

Boost Clock has increased by 44% (2435MHz vs 1695MHz)

Lower TDP (330W vs 350W)

Score

Benchmark

FP32 (float)

GeForce RTX 3090 +42%

35.58 TFLOPS

Radeon RX 6900 XTX

24.93 TFLOPS

GeForce RTX 3090

VS

Radeon RX 6900 XTX

Graphics Card

Sep 2020

Release Date

Unknown

GeForce 30

Generation

Navi II

Desktop

Type

Desktop

PCIe 4.0 x16

Bus Interface

PCIe 4.0 x16

Clock Speeds

1395 MHz

Base Clock

2075 MHz

1695 MHz

Boost Clock

2435 MHz

1219 MHz

Memory Clock

2250 MHz

Memory

24GB

Memory Size

16GB

GDDR6X

Memory Type

GDDR6

384bit

Memory Bus

256bit

936.2GB/s

Bandwidth

576.0GB/s

Render Config

82

SM Count

-

Compute Units

80

10496

Shading Units

5120

328

TMUs

320

112

ROPs

128

328

Tensor Cores

-

82

RT Cores

80

128 KB (per SM)

L1 Cache

128 KB per Array

6 MB

L2 Cache

4 MB

Theoretical Performance

189.8 GPixel/s

Pixel Rate

311.7 GPixel/s

556.0 GTexel/s

Texture Rate

779.2 GTexel/s

35.58 TFLOPS

FP16 (half)

49.87 TFLOPS

35.58 TFLOPS

FP32 (float)

24.93 TFLOPS

556.0 GFLOPS

FP64 (double)

1.558 TFLOPS

Graphics Processor

GA102

GPU Name

Navi 21

GA102-300-A1

GPU Variant

Navi 21 XTXH (215-121000247)

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

350W

TDP

330W

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 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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