AMD Radeon R5 M420 vs ATI Mobility Radeon HD 3870

VS

AMD Radeon R5 M420

ATI Mobility Radeon HD 3870

We compared two Mobile platform GPUs: 4GB VRAM Radeon R5 M420 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 R5 M420 's Advantages

Released 7 years and 11 months late

Boost Clock850MHz

More VRAM (4GB vs 512GB)

ATI Mobility Radeon HD 3870 's Advantages

Larger VRAM bandwidth (54.40GB/s vs 16.00GB/s)

Score

Benchmark

FP32 (float)

Radeon R5 M420 +28%

0.544 TFLOPS

Mobility Radeon HD 3870

0.422 TFLOPS

Radeon R5 M420

VS

Mobility Radeon HD 3870

Graphics Card

May 2016

Release Date

Jun 2008

Gem System

Generation

M8x

Mobile

Type

Mobile

PCIe 3.0 x8

Bus Interface

PCIe 2.0 x16

Clock Speeds

780 MHz

Base Clock

-

850 MHz

Boost Clock

-

1000 MHz

Memory Clock

850 MHz

Memory

4GB

Memory Size

512MB

DDR3

Memory Type

GDDR3

64bit

Memory Bus

256bit

16.00GB/s

Bandwidth

54.40GB/s

Render Config

5

Compute Units

4

-

320

Shading Units

320

20

TMUs

16

8

ROPs

16

-

16 KB (per CU)

L1 Cache

-

128 KB

L2 Cache

256 KB

-

Theoretical Performance

6.800 GPixel/s

Pixel Rate

10.56 GPixel/s

17.00 GTexel/s

Texture Rate

10.56 GTexel/s

-

544.0 GFLOPS

FP32 (float)

422.4 GFLOPS

34.00 GFLOPS

FP64 (double)

84.48 GFLOPS

Board Design

Unknown

TDP

55W

-

Portable Device Dependent

Outputs

No outputs

-

Graphics Processor

Jet

GPU Name

M88

Jet PRO (216-0856040)

GPU Variant

-

GCN 1.0

Architecture

TeraScale

TSMC

Foundry

TSMC

28 nm

Process Size

55 nm

0.69 billion

Transistors

0.666 billion

56 mm²

Die Size

192 mm²

Graphics Features

12 (11_1)

DirectX

10.1 (10_1)

4.6

OpenGL

3.3

2.1 (1.2)

OpenCL

N/A

1.2.170

Vulkan

N/A

-

6.5 (5.1)

Shader Model

4.1

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