ATI Mobility Radeon HD 3870 vs AMD Radeon Pro 555X

VS

ATI Mobility Radeon HD 3870

AMD Radeon Pro 555X

We compared two Mobile platform GPUs: 512MB VRAM Mobility Radeon HD 3870 and 4GB VRAM Radeon Pro 555X to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

ATI Mobility Radeon HD 3870 's Advantages

Lower TDP (55W vs 75W)

AMD Radeon Pro 555X 's Advantages

Released 10 years and 1 months late

More VRAM (4GB vs 512GB)

Larger VRAM bandwidth (94.08GB/s vs 54.40GB/s)

448 additional rendering cores

Score

Benchmark

FP32 (float)

Mobility Radeon HD 3870

0.422 TFLOPS

Radeon Pro 555X +230%

1.393 TFLOPS

Mobility Radeon HD 3870

VS

Radeon Pro 555X

Graphics Card

Jun 2008

Release Date

Jul 2018

M8x

Generation

Radeon Pro Mac

Mobile

Type

Mobile

PCIe 2.0 x16

Bus Interface

PCIe 3.0 x8

Clock Speeds

-

850 MHz

Memory Clock

1470 MHz

Memory

512MB

Memory Size

4GB

GDDR3

Memory Type

GDDR5

256bit

Memory Bus

128bit

54.40GB/s

Bandwidth

94.08GB/s

Render Config

4

Compute Units

12

-

320

Shading Units

768

16

TMUs

48

16

ROPs

16

-

L1 Cache

16 KB (per CU)

256 KB

L2 Cache

1024 KB

-

Theoretical Performance

10.56 GPixel/s

Pixel Rate

14.51 GPixel/s

10.56 GTexel/s

Texture Rate

43.54 GTexel/s

-

FP16 (half)

1393 GFLOPS

422.4 GFLOPS

FP32 (float)

1393 GFLOPS

84.48 GFLOPS

FP64 (double)

87.07 GFLOPS

Board Design

55W

TDP

75W

-

No outputs

Outputs

No outputs

-

Power Connectors

None

Graphics Processor

M88

GPU Name

Polaris 21

-

GPU Variant

Polaris 21 PRO

TeraScale

Architecture

GCN 4.0

TSMC

Foundry

GlobalFoundries

55 nm

Process Size

14 nm

0.666 billion

Transistors

3 billion

192 mm²

Die Size

123 mm²

Graphics Features

10.1 (10_1)

DirectX

12 (12_0)

3.3

OpenGL

4.6

N/A

OpenCL

2.1

N/A

Vulkan

1.2

-

4.1

Shader Model

6.4

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