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

VS

AMD Radeon HD 6990M

NVIDIA GeForce RTX 4090 Max-Q

We compared two Mobile platform GPUs: 2GB VRAM Radeon HD 6990M and 16GB VRAM GeForce RTX 4090 Max Q 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 2GB)

Larger VRAM bandwidth (448.0GB/s vs 115.2GB/s)

8608 additional rendering cores

Lower TDP (80W vs 100W)

Score

Benchmark

FP32 (float)

Radeon HD 6990M

1.602 TFLOPS

GeForce RTX 4090 Max Q +1667%

28.31 TFLOPS

Radeon HD 6990M

VS

GeForce RTX 4090 Max Q

Graphics Card

Jul 2011

Release Date

Jan 2023

Vancouver

Generation

GeForce 40 Mobile

Mobile

Type

Mobile

MXM-B (3.0)

Bus Interface

PCIe 4.0 x16

Clock Speeds

-

Base Clock

930 MHz

-

Boost Clock

1455 MHz

900 MHz

Memory Clock

1750 MHz

Memory

2GB

Memory Size

16GB

GDDR5

Memory Type

GDDR6

256bit

Memory Bus

256bit

115.2GB/s

Bandwidth

448.0GB/s

Render Config

14

Compute Units

-

SM Count

76

1120

Shading Units

9728

56

TMUs

304

32

ROPs

112

-

Tensor Cores

304

-

RT Cores

76

8 KB (per CU)

L1 Cache

128 KB (per SM)

512 KB

L2 Cache

64 MB

-

Theoretical Performance

22.88 GPixel/s

Pixel Rate

163.0 GPixel/s

40.04 GTexel/s

Texture Rate

442.3 GTexel/s

-

FP16 (half)

28.31 TFLOPS

1.602 TFLOPS

FP32 (float)

28.31 TFLOPS

-

FP64 (double)

442.3 GFLOPS

Board Design

100W

TDP

80W

-

No outputs

Outputs

Portable Device Dependent

None

Power Connectors

None

Graphics Processor

Blackcomb

GPU Name

AD103

Blackcomb XTX (216-0811030)

GPU Variant

GN21-X11

TeraScale 2

Architecture

Ada Lovelace

TSMC

Foundry

TSMC

40 nm

Process Size

4 nm

1.7 billion

Transistors

45.9 billion

212 mm²

Die Size

379 mm²

Graphics Features

11.2 (11_0)

DirectX

12 Ultimate (12_2)

4.4

OpenGL

4.6

1.2

OpenCL

3.0

N/A

Vulkan

1.3

-

CUDA

8.9

5.0

Shader Model

6.7

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