Radeon HD 6870 X2

Reference GPU

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At a Glance

Identity
Entry Type	Reference GPU
Official Name	AMD Radeon HD 6870 X2
Architecture	TeraScale 2
Launch Date	2011-07-08
Core Specs
GPU Die	Barts
Chip Variant / Package	HFCBGA-1737
Process Node	TSMC 40 nm
Transistor Count	1.7 billion
Die Size	255 mm²
Stream Processors	1120
TMUs	56
ROPs	32
Base Clock	900 MHz
Boost Clock	900 MHz
Pixel Fillrate	28.8 GP/s
Texture Fillrate	50.4 GT/s
FP32 Throughput	2.02 TFLOPS
Memory
Memory Size	1 GB
Memory Type	GDDR5
Memory Bus Width	256-bit
Memory Clock	1,050 MHz
Memory Bandwidth	134.4 GB/s
L2 Cache	0.5 MB
L1 Cache	8 KB
Board and Display
TDP / TBP	300 W
Recommended PSU	700 W
Interface	PCIe 2.0 x16
Display Outputs	2x DVI, 1x HDMI 1.3a, 2x mini-DisplayPort 1.1
Slot Width	Dual-slot
Card Length	304 mm
Software
Shader Model	5.0
DirectX Support	DirectX 11.0
OpenGL Support	OpenGL 4.4
OpenCL Support	OpenCL 1.2

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

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

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.

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