AMD Radeon HD 6990M Rebrand vs AMD Radeon RX 6600S

VS

AMD Radeon HD 6990M Rebrand

AMD Radeon RX 6600S

We compared two Mobile platform GPUs: 1024MB VRAM Radeon HD 6990M Rebrand and 4GB VRAM Radeon RX 6600S to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon RX 6600S 's Advantages

Released 10 years and 6 months late

Boost Clock2000MHz

More VRAM (4GB vs 1024GB)

Larger VRAM bandwidth (224.0GB/s vs 70.40GB/s)

992 additional rendering cores

Lower TDP (80W vs 100W)

Score

Benchmark

FP32 (float)

Radeon HD 6990M Rebrand

1.28 TFLOPS

Radeon RX 6600S +460%

7.168 TFLOPS

Radeon HD 6990M Rebrand

VS

Radeon RX 6600S

Graphics Card

Jul 2011

Release Date

Jan 2022

Vancouver

Generation

Mobility Radeon

Mobile

Type

Mobile

MXM-B (3.0)

Bus Interface

PCIe 4.0 x8

Clock Speeds

-

Base Clock

1700 MHz

-

Boost Clock

2000 MHz

1100 MHz

Memory Clock

1750 MHz

Memory

1024MB

Memory Size

4GB

GDDR5

Memory Type

GDDR6

128bit

Memory Bus

128bit

70.40GB/s

Bandwidth

224.0GB/s

Render Config

14

Compute Units

28

-

800

Shading Units

1792

40

TMUs

112

16

ROPs

64

-

RT Cores

28

8 KB (per CU)

L1 Cache

128 KB per Array

256 KB

L2 Cache

2 MB

-

L3 Cache

32 MB

Theoretical Performance

12.80 GPixel/s

Pixel Rate

128.0 GPixel/s

32.00 GTexel/s

Texture Rate

224.0 GTexel/s

-

FP16 (half)

14.34 TFLOPS

1280 GFLOPS

FP32 (float)

7.168 TFLOPS

-

FP64 (double)

448.0 GFLOPS

Board Design

100W

TDP

80W

-

No outputs

Outputs

No outputs

-

Power Connectors

None

Graphics Processor

Broadway

GPU Name

Navi 23

Broadway XTX

GPU Variant

-

TeraScale 2

Architecture

RDNA 2.0

TSMC

Foundry

TSMC

40 nm

Process Size

7 nm

1.04 billion

Transistors

11.06 billion

166 mm²

Die Size

237 mm²

Graphics Features

11.2 (11_0)

DirectX

12 Ultimate (12_2)

4.4

OpenGL

4.6

1.2

OpenCL

2.1

N/A

Vulkan

1.3

-

5.0

Shader Model

6.5

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