NVIDIA GeForce RTX 4080 Mobile vs AMD Radeon HD 6990M

VS

NVIDIA GeForce RTX 4080 Mobile AMD Radeon HD 6990M

We compared two Mobile platform GPUs: 12GB VRAM GeForce RTX 4080 Mobile and 2GB VRAM Radeon HD 6990M to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce RTX 4080 Mobile 's Advantages

Released 11 years and 6 months late

Boost Clock1665MHz

More VRAM (12GB vs 2GB)

Larger VRAM bandwidth (432.0GB/s vs 115.2GB/s)

6304 additional rendering cores

AMD Radeon HD 6990M 's Advantages

Lower TDP (100W vs 110W)

Score

Benchmark

FP32 (float)

GeForce RTX 4080 Mobile +1443%

24.72 TFLOPS

Radeon HD 6990M

1.602 TFLOPS

GeForce RTX 4080 Mobile

VS

Radeon HD 6990M

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

1290 MHz

Base Clock

-

1665 MHz

Boost Clock

-

2250 MHz

Memory Clock

900 MHz

Memory

12GB

Memory Size

2GB

GDDR6

Memory Type

GDDR5

192bit

Memory Bus

256bit

432.0GB/s

Bandwidth

115.2GB/s

Render Config

58

SM Count

-

Compute Units

14

7424

Shading Units

1120

232

TMUs

56

80

ROPs

32

232

Tensor Cores

-

58

RT Cores

-

128 KB (per SM)

L1 Cache

8 KB (per CU)

48 MB

L2 Cache

512 KB

Theoretical Performance

133.2 GPixel/s

Pixel Rate

22.88 GPixel/s

386.3 GTexel/s

Texture Rate

40.04 GTexel/s

24.72 TFLOPS

FP16 (half)

-

24.72 TFLOPS

FP32 (float)

1.602 TFLOPS

386.3 GFLOPS

FP64 (double)

-

Graphics Processor

AD104

GPU Name

Blackcomb

GN21-X9

GPU Variant

Blackcomb XTX (216-0811030)

Ada Lovelace

Architecture

TeraScale 2

TSMC

Foundry

TSMC

4 nm

Process Size

40 nm

35.8 billion

Transistors

1.7 billion

295 mm²

Die Size

212 mm²

Board Design

110W

TDP

100W

-

Suggested PSU

-

Portable Device Dependent

Outputs

No outputs

None

Power Connectors

None

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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