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

VS

AMD Radeon RX 6600M

AMD Radeon HD 6990M Rebrand

We compared two Mobile platform GPUs: 8GB VRAM Radeon RX 6600M and 1024MB VRAM Radeon HD 6990M Rebrand to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon RX 6600M 's Advantages

Released 9 years and 10 months late

Boost Clock2416MHz

More VRAM (8GB vs 1024GB)

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

992 additional rendering cores

Score

Benchmark

FP32 (float)

Radeon RX 6600M +576%

8.659 TFLOPS

Radeon HD 6990M Rebrand

1.28 TFLOPS

Radeon RX 6600M

VS

Radeon HD 6990M Rebrand

Graphics Card

May 2021

Release Date

Jul 2011

Mobility Radeon

Generation

Vancouver

Mobile

Type

Mobile

PCIe 4.0 x8

Bus Interface

MXM-B (3.0)

Clock Speeds

2068 MHz

Base Clock

-

2416 MHz

Boost Clock

-

1750 MHz

Memory Clock

1100 MHz

Memory

8GB

Memory Size

1024MB

GDDR6

Memory Type

GDDR5

128bit

Memory Bus

128bit

224.0GB/s

Bandwidth

70.40GB/s

Render Config

28

Compute Units

14

-

1792

Shading Units

800

112

TMUs

40

64

ROPs

16

-

28

RT Cores

-

128 KB per Array

L1 Cache

8 KB (per CU)

2 MB

L2 Cache

256 KB

32 MB

L3 Cache

-

Theoretical Performance

154.6 GPixel/s

Pixel Rate

12.80 GPixel/s

270.6 GTexel/s

Texture Rate

32.00 GTexel/s

17.32 TFLOPS

FP16 (half)

-

8.659 TFLOPS

FP32 (float)

1280 GFLOPS

541.2 GFLOPS

FP64 (double)

-

Board Design

100W

TDP

100W

-

No outputs

Outputs

No outputs

None

Power Connectors

-

Graphics Processor

Navi 23

GPU Name

Broadway

-

GPU Variant

Broadway XTX

RDNA 2.0

Architecture

TeraScale 2

TSMC

Foundry

TSMC

7 nm

Process Size

40 nm

11.06 billion

Transistors

1.04 billion

237 mm²

Die Size

166 mm²

Graphics Features

12 Ultimate (12_2)

DirectX

11.2 (11_0)

4.6

OpenGL

4.4

2.1

OpenCL

1.2

1.3

Vulkan

N/A

-

6.5

Shader Model

5.0

Related GPU Comparisons

1

AMD Radeon RX 6600M vs ATI Radeon E4690 MXM

2

AMD Radeon RX 6600M vs NVIDIA GeForce GTX 780M Mac Edition

3

AMD Radeon RX 6600M vs NVIDIA GeForce MX350

4

AMD Radeon RX 6600M vs AMD Radeon RX 6700M

5

AMD Radeon RX 6600M vs ATI Mobility Radeon HD 3670

6

AMD Radeon RX 6600M vs AMD FirePro M7740

7

AMD Radeon RX 6600M vs AMD Radeon HD 6750M Mac Edition

8

AMD Radeon RX 6600M vs NVIDIA GeForce RTX 3060 Mobile

9

AMD Radeon RX 6600M vs NVIDIA GeForce GTX 1050 Mobile 3 GB

10

AMD Radeon RX 6600M vs NVIDIA GeForce RTX 3050 A Mobile

Related News

1

Intel Wildcat Lake Appears on Shipping List with FCBGA1516 Socket, Poised to Replace Alder Lake-N

2

The Commencement of ARM and Qualcomm Licensing Dispute Trial: Potential Major Impact on PC Market

3

NVIDIA Allegedly Equips RTX 5080 with 30Gbps Memory Speed, Other Models to Feature 28Gbps

4

Intel Reports High Return Rates for Devices Featuring Snapdragon X Series; Qualcomm Counters with 'Industry Standard' Claim

5

Intel Confirms Panther Lake Adopts 18A Process, ES0 Samples Already Sent to Customers

6

Complete Lineup of Core Ultra 200HX/H/U and Core 200H/U Revealed: 31 Models to Dazzle the Eyes

7

Amechi Unveils V1 Mini PC: Only 0.33L Volume with 150W Power Consumption

8

iPhone 17 Series Set for Major Design Overhaul: Camera Module Transformed into Sleek Strip

9

The Thinnest iPhone Ever! iPhone 17 Air Reportedly Enters Foxconn's NPI Stage

10

Apple Allegedly Cancels M4 Extreme, Originally Planned for Mac Pro with 64-Core CPU and 160-Core GPU