AMD Radeon RX 6600S vs AMD Radeon HD 6870M

VS

AMD Radeon RX 6600S

AMD Radeon HD 6870M

We compared two Mobile platform GPUs: 4GB VRAM Radeon RX 6600S and 1024MB VRAM Radeon HD 6870M to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon RX 6600S 's Advantages

Released 11 years late

Boost Clock2000MHz

More VRAM (4GB vs 1024GB)

Larger VRAM bandwidth (224.0GB/s vs 64.00GB/s)

992 additional rendering cores

AMD Radeon HD 6870M 's Advantages

Lower TDP (50W vs 80W)

Score

Benchmark

FP32 (float)

Radeon RX 6600S +563%

7.168 TFLOPS

Radeon HD 6870M

1.08 TFLOPS

Radeon RX 6600S

VS

Radeon HD 6870M

Graphics Card

Jan 2022

Release Date

Jan 2011

Mobility Radeon

Generation

Vancouver

Mobile

Type

Mobile

PCIe 4.0 x8

Bus Interface

MXM-B (3.0)

Clock Speeds

1700 MHz

Base Clock

-

2000 MHz

Boost Clock

-

1750 MHz

Memory Clock

1000 MHz

Memory

4GB

Memory Size

1024MB

GDDR6

Memory Type

GDDR5

128bit

Memory Bus

128bit

224.0GB/s

Bandwidth

64.00GB/s

Render Config

28

Compute Units

10

-

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

128.0 GPixel/s

Pixel Rate

10.80 GPixel/s

224.0 GTexel/s

Texture Rate

27.00 GTexel/s

14.34 TFLOPS

FP16 (half)

-

7.168 TFLOPS

FP32 (float)

1080 GFLOPS

448.0 GFLOPS

FP64 (double)

-

Board Design

80W

TDP

50W

-

No outputs

Outputs

No outputs

None

Power Connectors

-

Graphics Processor

Navi 23

GPU Name

Granville

-

GPU Variant

Granville XT (216-0769024)

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

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