AMD Radeon RX 6600S vs ATI Mobility Radeon HD 3870

VS

AMD Radeon RX 6600S

ATI Mobility Radeon HD 3870

We compared two Mobile platform GPUs: 4GB VRAM Radeon RX 6600S and 512MB VRAM Mobility Radeon HD 3870 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon RX 6600S 's Advantages

Released 13 years and 7 months late

Boost Clock2000MHz

More VRAM (4GB vs 512GB)

Larger VRAM bandwidth (224.0GB/s vs 54.40GB/s)

1472 additional rendering cores

ATI Mobility Radeon HD 3870 's Advantages

Lower TDP (55W vs 80W)

Score

Benchmark

FP32 (float)

Radeon RX 6600S +1598%

7.168 TFLOPS

Mobility Radeon HD 3870

0.422 TFLOPS

Radeon RX 6600S

VS

Mobility Radeon HD 3870

Graphics Card

Jan 2022

Release Date

Jun 2008

Mobility Radeon

Generation

M8x

Mobile

Type

Mobile

PCIe 4.0 x8

Bus Interface

PCIe 2.0 x16

Clock Speeds

1700 MHz

Base Clock

-

2000 MHz

Boost Clock

-

1750 MHz

Memory Clock

850 MHz

Memory

4GB

Memory Size

512MB

GDDR6

Memory Type

GDDR3

128bit

Memory Bus

256bit

224.0GB/s

Bandwidth

54.40GB/s

Render Config

28

Compute Units

4

-

1792

Shading Units

320

112

TMUs

16

64

ROPs

16

-

28

RT Cores

-

128 KB per Array

L1 Cache

-

2 MB

L2 Cache

256 KB

32 MB

L3 Cache

-

Theoretical Performance

128.0 GPixel/s

Pixel Rate

10.56 GPixel/s

224.0 GTexel/s

Texture Rate

10.56 GTexel/s

14.34 TFLOPS

FP16 (half)

-

7.168 TFLOPS

FP32 (float)

422.4 GFLOPS

448.0 GFLOPS

FP64 (double)

84.48 GFLOPS

Board Design

80W

TDP

55W

-

No outputs

Outputs

No outputs

None

Power Connectors

-

Graphics Processor

Navi 23

GPU Name

M88

-

RDNA 2.0

Architecture

TeraScale

TSMC

Foundry

TSMC

7 nm

Process Size

55 nm

11.06 billion

Transistors

0.666 billion

237 mm²

Die Size

192 mm²

Graphics Features

12 Ultimate (12_2)

DirectX

10.1 (10_1)

4.6

OpenGL

3.3

2.1

OpenCL

N/A

1.3

Vulkan

N/A

-

6.5

Shader Model

4.1

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