AMD Radeon RX 640 Mobile vs AMD Radeon RX 560X Mobile

VS

AMD Radeon RX 640 Mobile

AMD Radeon RX 560X Mobile

We compared two Mobile platform GPUs: 2GB VRAM Radeon RX 640 Mobile and 4GB VRAM Radeon RX 560X Mobile to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon RX 640 Mobile 's Advantages

Boost Clock1218MHz

Lower TDP (50W vs 65W)

AMD Radeon RX 560X Mobile 's Advantages

More VRAM (4GB vs 2GB)

Larger VRAM bandwidth (112.0GB/s vs 48.00GB/s)

256 additional rendering cores

Score

Benchmark

FP32 (float)

Radeon RX 640 Mobile

1.559 TFLOPS

Radeon RX 560X Mobile +40%

2.192 TFLOPS

Radeon RX 640 Mobile

VS

Radeon RX 560X Mobile

Graphics Card

May 2019

Release Date

Jan 2019

Mobility Radeon

Generation

Mobility Radeon

Mobile

Type

Mobile

PCIe 3.0 x8

Bus Interface

PCIe 3.0 x16

Clock Speeds

1082 MHz

Base Clock

-

1218 MHz

Boost Clock

-

1500 MHz

Memory Clock

1750 MHz

Memory

2GB

Memory Size

4GB

GDDR5

Memory Type

GDDR5

64bit

Memory Bus

128bit

48.00GB/s

Bandwidth

112.0GB/s

Render Config

10

Compute Units

14

-

640

Shading Units

896

40

TMUs

56

16

ROPs

16

-

16 KB (per CU)

L1 Cache

16 KB (per CU)

512 KB

L2 Cache

1024 KB

-

Theoretical Performance

19.49 GPixel/s

Pixel Rate

19.57 GPixel/s

48.72 GTexel/s

Texture Rate

68.49 GTexel/s

1.559 TFLOPS

FP16 (half)

2.192 TFLOPS

1.559 TFLOPS

FP32 (float)

2.192 TFLOPS

97.44 GFLOPS

FP64 (double)

137.0 GFLOPS

Board Design

50W

TDP

65W

-

No outputs

Outputs

No outputs

None

Power Connectors

None

Graphics Processor

Polaris 23

GPU Name

Polaris 31

Polaris 23 XT

GPU Variant

Polaris 31 MXL

GCN 4.0

Architecture

GCN 4.0

GlobalFoundries

Foundry

GlobalFoundries

14 nm

Process Size

14 nm

2.2 billion

Transistors

3 billion

103 mm²

Die Size

123 mm²

Graphics Features

12 (12_0)

DirectX

12 (12_0)

4.6

OpenGL

4.6

2.1

OpenCL

2.1

1.2

Vulkan

1.2

-

6.4

Shader Model

6.4

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