NVIDIA GeForce RTX 4090 Max-Q vs AMD Radeon RX 6850M XT

VS

NVIDIA GeForce RTX 4090 Max-Q AMD Radeon RX 6850M XT

We compared two Mobile platform GPUs: 16GB VRAM GeForce RTX 4090 Max Q and 12GB VRAM Radeon RX 6850M XT to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce RTX 4090 Max-Q 's Advantages

Released 1 years late

More VRAM (16GB vs 12GB)

Larger VRAM bandwidth (448.0GB/s vs 384.0GB/s)

7168 additional rendering cores

Lower TDP (80W vs 165W)

AMD Radeon RX 6850M XT 's Advantages

Boost Clock has increased by 77% (2581MHz vs 1455MHz)

Score

Benchmark

FP32 (float)

GeForce RTX 4090 Max Q +114%

28.31 TFLOPS

Radeon RX 6850M XT

13.21 TFLOPS

GeForce RTX 4090 Max Q

VS

Radeon RX 6850M XT

Graphics Card

Jan 2023

Release Date

Jan 2022

GeForce 40 Mobile

Generation

Mobility Radeon

Mobile

Type

Mobile

PCIe 4.0 x16

Bus Interface

PCIe 4.0 x16

Clock Speeds

930 MHz

Base Clock

2321 MHz

1455 MHz

Boost Clock

2581 MHz

1750 MHz

Memory Clock

2000 MHz

Memory

16GB

Memory Size

12GB

GDDR6

Memory Type

GDDR6

256bit

Memory Bus

192bit

448.0GB/s

Bandwidth

384.0GB/s

Render Config

76

SM Count

-

Compute Units

40

9728

Shading Units

2560

304

TMUs

160

112

ROPs

64

304

Tensor Cores

-

76

RT Cores

40

128 KB (per SM)

L1 Cache

128 KB per Array

64 MB

L2 Cache

3 MB

Theoretical Performance

163.0 GPixel/s

Pixel Rate

165.2 GPixel/s

442.3 GTexel/s

Texture Rate

413.0 GTexel/s

28.31 TFLOPS

FP16 (half)

26.43 TFLOPS

28.31 TFLOPS

FP32 (float)

13.21 TFLOPS

442.3 GFLOPS

FP64 (double)

825.9 GFLOPS

Graphics Processor

AD103

GPU Name

Navi 22

GN21-X11

GPU Variant

Navi 22 XTM

Ada Lovelace

Architecture

RDNA 2.0

TSMC

Foundry

TSMC

4 nm

Process Size

7 nm

45.9 billion

Transistors

17.2 billion

379 mm²

Die Size

335 mm²

Board Design

80W

TDP

165W

-

Suggested PSU

-

Portable Device Dependent

Outputs

No outputs

None

Power Connectors

None

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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