Mobility Radeon HD 3870

Laptop GPU

TeraScale Radeon HD 3000 / 2000 Series Mobile Laptop GDDR3 2008

Add to comparison

Save this GPU, then open another GPU page to compare them side by side.

At a Glance

Entry Type: Laptop GPU
Architecture: TeraScale
Series: Radeon HD 3000 / 2000 Series
GPU Die: M88
Launch Date: 2008-06-04
Stream Processors: 320
TMUs: 16
ROPs: 16
Memory: 512 MB GDDR3
Bus Width: 256-bit
TDP/TBP: 55 W
Interface: PCIe 2.0 x16
Data Confidence: Partial

GPU Specs

What do these fields mean?Partial

Identity
Entry Type	Laptop GPU
Official Name	ATI Mobility Radeon HD 3870
Architecture	TeraScale
Launch Date	2008-06-04
Core Specs
GPU Die	M88
Chip Variant / Package	FCBGA-1281
Process Node	TSMC 55 nm
Transistor Count	0.67 billion
Die Size	192 mm²
Stream Processors	320
TMUs	16
ROPs	16
Base Clock	660 MHz
Boost Clock	660 MHz
Pixel Fillrate	10.56 GP/s
Texture Fillrate	10.56 GT/s
FP32 Throughput	0.42 TFLOPS
FP64 Throughput	0.08 TFLOPS
Memory
Memory Size	512 MB
Memory Type	GDDR3
Memory Bus Width	256-bit
Memory Clock	850 MHz
Memory Bandwidth	54.4 GB/s
L2 Cache	0.25 MB
Board and Display
TDP / TBP	55 W
Interface	PCIe 2.0 x16
Software
Shader Model	4.1
DirectX Support	DirectX 10.1
OpenGL Support	OpenGL 3.3

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

TechPowerUp GPU SpecsOpen source

Found an incorrect spec, missing source, or variant issue?

Submit a correction