AMD Radeon RX 6850M XT vs ATI Mobility Radeon HD 3870 X2

VS

AMD Radeon RX 6850M XT

ATI Mobility Radeon HD 3870 X2

We compared two Mobile platform GPUs: 12GB VRAM Radeon RX 6850M XT and 512MB VRAM Mobility Radeon HD 3870 X2 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon RX 6850M XT 's Advantages

Released 13 years and 4 months late

Boost Clock2581MHz

More VRAM (12GB vs 512GB)

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

2240 additional rendering cores

ATI Mobility Radeon HD 3870 X2 's Advantages

Lower TDP (110W vs 165W)

Score

Benchmark

FP32 (float)

Radeon RX 6850M XT +3030%

13.21 TFLOPS

Mobility Radeon HD 3870 X2

0.422 TFLOPS

Radeon RX 6850M XT

VS

Mobility Radeon HD 3870 X2

Graphics Card

Jan 2022

Release Date

Sep 2008

Mobility Radeon

Generation

M8x

Mobile

Type

Mobile

PCIe 4.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

2321 MHz

Base Clock

-

2581 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

165.2 GPixel/s

Pixel Rate

10.56 GPixel/s

413.0 GTexel/s

Texture Rate

10.56 GTexel/s

26.43 TFLOPS

FP16 (half)

-

13.21 TFLOPS

FP32 (float)

422.4 GFLOPS

825.9 GFLOPS

FP64 (double)

84.48 GFLOPS

Board Design

165W

TDP

110W

-

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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