NVIDIA GeForce RTX 4090 Max-Q vs AMD Radeon HD 6990M Rebrand

VS

NVIDIA GeForce RTX 4090 Max-Q

AMD Radeon HD 6990M Rebrand

We compared two Mobile platform GPUs: 16GB VRAM GeForce RTX 4090 Max Q and 1024MB VRAM Radeon HD 6990M Rebrand 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 11 years and 6 months late

Boost Clock1455MHz

More VRAM (16GB vs 1024GB)

Larger VRAM bandwidth (448.0GB/s vs 70.40GB/s)

8928 additional rendering cores

Lower TDP (80W vs 100W)

Score

Benchmark

FP32 (float)

GeForce RTX 4090 Max Q +2111%

28.31 TFLOPS

Radeon HD 6990M Rebrand

1.28 TFLOPS

GeForce RTX 4090 Max Q

VS

Radeon HD 6990M Rebrand

Graphics Card

Jan 2023

Release Date

Jul 2011

GeForce 40 Mobile

Generation

Vancouver

Mobile

Type

Mobile

PCIe 4.0 x16

Bus Interface

MXM-B (3.0)

Clock Speeds

930 MHz

Base Clock

-

1455 MHz

Boost Clock

-

1750 MHz

Memory Clock

1100 MHz

Memory

16GB

Memory Size

1024MB

GDDR6

Memory Type

GDDR5

256bit

Memory Bus

128bit

448.0GB/s

Bandwidth

70.40GB/s

Render Config

-

Compute Units

14

76

SM Count

-

9728

Shading Units

800

304

TMUs

40

112

ROPs

16

304

Tensor Cores

-

76

RT Cores

-

128 KB (per SM)

L1 Cache

8 KB (per CU)

64 MB

L2 Cache

256 KB

-

Theoretical Performance

163.0 GPixel/s

Pixel Rate

12.80 GPixel/s

442.3 GTexel/s

Texture Rate

32.00 GTexel/s

28.31 TFLOPS

FP16 (half)

-

28.31 TFLOPS

FP32 (float)

1280 GFLOPS

442.3 GFLOPS

FP64 (double)

-

Board Design

80W

TDP

100W

-

Portable Device Dependent

Outputs

No outputs

None

Power Connectors

-

Graphics Processor

AD103

GPU Name

Broadway

GN21-X11

GPU Variant

Broadway XTX

Ada Lovelace

Architecture

TeraScale 2

TSMC

Foundry

TSMC

4 nm

Process Size

40 nm

45.9 billion

Transistors

1.04 billion

379 mm²

Die Size

166 mm²

Graphics Features

12 Ultimate (12_2)

DirectX

11.2 (11_0)

4.6

OpenGL

4.4

3.0

OpenCL

1.2

1.3

Vulkan

N/A

8.9

CUDA

-

6.7

Shader Model

5.0

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