AMD Radeon RX 6800M vs ATI Mobility Radeon HD 3870

VS

AMD Radeon RX 6800M

ATI Mobility Radeon HD 3870

We compared two Mobile platform GPUs: 12GB VRAM Radeon RX 6800M 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 6800M 's Advantages

Released 12 years and 11 months late

Boost Clock2390MHz

More VRAM (12GB vs 512GB)

Larger VRAM bandwidth (384.0GB/s vs 54.40GB/s)

2240 additional rendering cores

ATI Mobility Radeon HD 3870 's Advantages

Lower TDP (55W vs 145W)

Score

Benchmark

FP32 (float)

Radeon RX 6800M +2800%

12.24 TFLOPS

Mobility Radeon HD 3870

0.422 TFLOPS

Radeon RX 6800M

VS

Mobility Radeon HD 3870

Graphics Card

May 2021

Release Date

Jun 2008

Mobility Radeon

Generation

M8x

Mobile

Type

Mobile

PCIe 4.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

2116 MHz

Base Clock

-

2390 MHz

Boost Clock

-

2000 MHz

Memory Clock

850 MHz

Memory

12GB

Memory Size

512MB

GDDR6

Memory Type

GDDR3

192bit

Memory Bus

256bit

384.0GB/s

Bandwidth

54.40GB/s

Render Config

40

Compute Units

4

-

2560

Shading Units

320

160

TMUs

16

64

ROPs

16

-

40

RT Cores

-

128 KB per Array

L1 Cache

-

3 MB

L2 Cache

256 KB

96 MB

L3 Cache

-

Theoretical Performance

153.0 GPixel/s

Pixel Rate

10.56 GPixel/s

382.4 GTexel/s

Texture Rate

10.56 GTexel/s

24.47 TFLOPS

FP16 (half)

-

12.24 TFLOPS

FP32 (float)

422.4 GFLOPS

764.8 GFLOPS

FP64 (double)

84.48 GFLOPS

Board Design

145W

TDP

55W

-

No outputs

Outputs

No outputs

None

Power Connectors

-

Graphics Processor

Navi 22

GPU Name

M88

Navi 22 XTM

GPU Variant

-

RDNA 2.0

Architecture

TeraScale

TSMC

Foundry

TSMC

7 nm

Process Size

55 nm

17.2 billion

Transistors

0.666 billion

335 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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