NVIDIA GeForce RTX 4090 vs AMD Radeon RX 6900 XTX

VS

NVIDIA GeForce RTX 4090 AMD Radeon RX 6900 XTX

We compared two Desktop platform GPUs: 24GB VRAM GeForce RTX 4090 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 4090 's Advantages

Boost Clock has increased by 3% (2520MHz vs 2435MHz)

More VRAM (24GB vs 16GB)

11264 additional rendering cores

AMD Radeon RX 6900 XTX 's Advantages

Larger VRAM bandwidth (576.0TB/s vs 1.01TB/s)

Lower TDP (330W vs 450W)

Score

Benchmark

FP32 (float)

GeForce RTX 4090 +231%

82.58 TFLOPS

Radeon RX 6900 XTX

24.93 TFLOPS

GeForce RTX 4090

VS

Radeon RX 6900 XTX

Graphics Card

Sep 2022

Release Date

Unknown

GeForce 40

Generation

Navi II

Desktop

Type

Desktop

PCIe 4.0 x16

Bus Interface

PCIe 4.0 x16

Clock Speeds

2235 MHz

Base Clock

2075 MHz

2520 MHz

Boost Clock

2435 MHz

1313 MHz

Memory Clock

2250 MHz

Memory

24GB

Memory Size

16GB

GDDR6X

Memory Type

GDDR6

384bit

Memory Bus

256bit

1.01TB/s

Bandwidth

576.0GB/s

Render Config

128

SM Count

-

Compute Units

80

16384

Shading Units

5120

512

TMUs

320

176

ROPs

128

512

Tensor Cores

-

128

RT Cores

80

128 KB (per SM)

L1 Cache

128 KB per Array

72 MB

L2 Cache

4 MB

Theoretical Performance

443.5 GPixel/s

Pixel Rate

311.7 GPixel/s

1290 GTexel/s

Texture Rate

779.2 GTexel/s

82.58 TFLOPS

FP16 (half)

49.87 TFLOPS

82.58 TFLOPS

FP32 (float)

24.93 TFLOPS

1290 GFLOPS

FP64 (double)

1.558 TFLOPS

Graphics Processor

AD102

GPU Name

Navi 21

AD102-300-A1

GPU Variant

Navi 21 XTXH (215-121000247)

Ada Lovelace

Architecture

RDNA 2.0

TSMC

Foundry

TSMC

5 nm

Process Size

7 nm

76.3 billion

Transistors

26.8 billion

609 mm²

Die Size

520 mm²

Board Design

450W

TDP

330W

850 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 16-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

8.9

CUDA

-

6.7

Shader Model

6.5

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