Radeon RX 640 Mobile

Laptop GPU

GCN 4.0 Radeon RX 6000 Series Mobile Laptop GDDR5 2019

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At a Glance

Entry Type: Laptop GPU
Architecture: GCN 4.0
Series: Radeon RX 6000 Series
GPU Die: Polaris 23
Launch Date: 2019-05-13
Stream Processors: 640
TMUs: 40
ROPs: 16
Memory: 2 GB GDDR5
Bus Width: 64-bit
TDP/TBP: 50 W
Interface: PCIe 3.0 x8
Data Confidence: Partial

GPU Specs

What do these fields mean?Partial

Identity
Entry Type	Laptop GPU
Official Name	AMD Radeon RX 640 Mobile
Architecture	GCN 4.0
Launch Date	2019-05-13
Core Specs
GPU Die	Polaris 23
Chip Variant / Package	BGA-769
Process Node	GlobalFoundries 14 nm
Transistor Count	2.2 billion
Die Size	103 mm²
Stream Processors	640
TMUs	40
ROPs	16
Base Clock	1,082 MHz
Boost Clock	1,218 MHz
Pixel Fillrate	19.49 GP/s
Texture Fillrate	48.72 GT/s
FP32 Throughput	1.56 TFLOPS
FP16 Throughput	1.56 TFLOPS
FP64 Throughput	0.1 TFLOPS
Memory
Memory Size	2 GB
Memory Type	GDDR5
Memory Bus Width	64-bit
Memory Clock	1,500 MHz
Memory Bandwidth	48 GB/s
L2 Cache	0.5 MB
L1 Cache	16 KB
Board and Display
TDP / TBP	50 W
Interface	PCIe 3.0 x8
Slot Width	IGP
Software
Shader Model	6.7
DirectX Support	DirectX 12.0
Vulkan Support	Vulkan 1.3
OpenGL Support	OpenGL 4.6
OpenCL Support	OpenCL 2.1

This GPU Wiki entry is being expanded and source-checked.

Why It Mattered

This entry is currently a specification record. Historical notes will be added after source review.

Known Issues

Known issues pending source review.

SourcesPartial

Sources reviewed: 2026-06-23

This entry is still being source-checked.

Data confidence and source status

Partial entry. Core specifications may be present, but history, variant notes, known issues, and source review may be incomplete.

Verified: core specifications and historical notes have been reviewed against listed sources.
Partial: core specifications may be present, but history, variant notes, known issues, and source review may be incomplete.
Imported: spec-only imported entry pending editorial source review.
Needs source review: narrative notes are incomplete until reviewed.

Independent reference sources

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