Radeon HD 6990

Reference GPU

TeraScale 3 Radeon HD 6000 Series Gaming Desktop GDDR5 2011

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At a Glance

Entry Type: Reference GPU
Architecture: TeraScale 3
Series: Radeon HD 6000 Series
GPU Die: Antilles
Launch Date: 2011-03-08
Stream Processors: 1,536
TMUs: 96
ROPs: 32
Memory: 2 GB GDDR5
Bus Width: 256-bit
TDP/TBP: 375 W
Rec. PSU: 750 W
Interface: PCIe 2.0 x16
Data Confidence: Partial

GPU Specs

What do these fields mean?Partial

Identity
Entry Type	Reference GPU
Official Name	AMD Radeon HD 6990
Architecture	TeraScale 3
Launch Date	2011-03-08
Core Specs
GPU Die	Antilles
Process Node	TSMC 40 nm
Transistor Count	2.64 billion
Die Size	389 mm²
Stream Processors	1536
TMUs	96
ROPs	32
Base Clock	830 MHz
Boost Clock	830 MHz
Pixel Fillrate	26.56 GP/s
Texture Fillrate	79.68 GT/s
FP32 Throughput	2.55 TFLOPS
FP64 Throughput	0.64 TFLOPS
Memory
Memory Size	2 GB
Memory Type	GDDR5
Memory Bus Width	256-bit
Memory Clock	1,250 MHz
Memory Bandwidth	160 GB/s
L2 Cache	0.5 MB
L1 Cache	8 KB
Board and Display
TDP / TBP	375 W
Recommended PSU	750 W
Interface	PCIe 2.0 x16
Display Outputs	1x DVI, 4x mini-DisplayPort 1.2
Slot Width	Dual-slot
Card Length	310 mm
Software
Shader Model	5.0
DirectX Support	DirectX 11.0
OpenGL Support	OpenGL 4.4
OpenCL Support	OpenCL 1.2

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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

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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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