AMD Radeon RX 640 Mobile vs AMD Radeon R5 M420

VS

AMD Radeon RX 640 Mobile

AMD Radeon R5 M420

We compared two Mobile platform GPUs: 2GB VRAM Radeon RX 640 Mobile and 4GB VRAM Radeon R5 M420 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon RX 640 Mobile 's Advantages

Released 3 years late

Boost Clock has increased by 43% (1218MHz vs 850MHz)

Larger VRAM bandwidth (48.00GB/s vs 16.00GB/s)

320 additional rendering cores

AMD Radeon R5 M420 's Advantages

More VRAM (4GB vs 2GB)

Score

Benchmark

FP32 (float)

Radeon RX 640 Mobile +186%

1.559 TFLOPS

Radeon R5 M420

0.544 TFLOPS

Radeon RX 640 Mobile

VS

Radeon R5 M420

Graphics Card

May 2019

Release Date

May 2016

Mobility Radeon

Generation

Gem System

Mobile

Type

Mobile

PCIe 3.0 x8

Bus Interface

PCIe 3.0 x8

Clock Speeds

1082 MHz

Base Clock

780 MHz

1218 MHz

Boost Clock

850 MHz

1500 MHz

Memory Clock

1000 MHz

Memory

2GB

Memory Size

4GB

GDDR5

Memory Type

DDR3

64bit

Memory Bus

64bit

48.00GB/s

Bandwidth

16.00GB/s

Render Config

10

Compute Units

5

-

640

Shading Units

320

40

TMUs

20

16

ROPs

8

-

16 KB (per CU)

L1 Cache

16 KB (per CU)

512 KB

L2 Cache

128 KB

-

Theoretical Performance

19.49 GPixel/s

Pixel Rate

6.800 GPixel/s

48.72 GTexel/s

Texture Rate

17.00 GTexel/s

1.559 TFLOPS

FP16 (half)

-

1.559 TFLOPS

FP32 (float)

544.0 GFLOPS

97.44 GFLOPS

FP64 (double)

34.00 GFLOPS

Board Design

50W

TDP

Unknown

-

No outputs

Outputs

Portable Device Dependent

None

Power Connectors

-

Graphics Processor

Polaris 23

GPU Name

Jet

Polaris 23 XT

GPU Variant

Jet PRO (216-0856040)

GCN 4.0

Architecture

GCN 1.0

GlobalFoundries

Foundry

TSMC

14 nm

Process Size

28 nm

2.2 billion

Transistors

0.69 billion

103 mm²

Die Size

56 mm²

Graphics Features

12 (12_0)

DirectX

12 (11_1)

4.6

OpenGL

4.6

2.1

OpenCL

2.1 (1.2)

1.2

Vulkan

1.2.170

-

6.4

Shader Model

6.5 (5.1)

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