NVIDIA GeForce RTX 4090 Mobile vs AMD Radeon HD 6990M Rebrand

VS

NVIDIA GeForce RTX 4090 Mobile

AMD Radeon HD 6990M Rebrand

We compared two Mobile platform GPUs: 16GB VRAM GeForce RTX 4090 Mobile 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 Mobile 's Advantages

Released 11 years and 6 months late

Boost Clock1695MHz

More VRAM (16GB vs 1024GB)

Larger VRAM bandwidth (576.0GB/s vs 70.40GB/s)

8928 additional rendering cores

Lower TDP (80W vs 100W)

Score

Benchmark

FP32 (float)

GeForce RTX 4090 Mobile +2476%

32.98 TFLOPS

Radeon HD 6990M Rebrand

1.28 TFLOPS

GeForce RTX 4090 Mobile

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

1335 MHz

Base Clock

-

1695 MHz

Boost Clock

-

2250 MHz

Memory Clock

1100 MHz

Memory

16GB

Memory Size

1024MB

GDDR6

Memory Type

GDDR5

256bit

Memory Bus

128bit

576.0GB/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

189.8 GPixel/s

Pixel Rate

12.80 GPixel/s

515.3 GTexel/s

Texture Rate

32.00 GTexel/s

32.98 TFLOPS

FP16 (half)

-

32.98 TFLOPS

FP32 (float)

1280 GFLOPS

515.3 GFLOPS

FP64 (double)

-

Board Design

80-150W

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

5 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

-

6.8

Shader Model

5.0

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