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Graphics cards/AMD Radeon RX 6600 XT

AMD · Radeon RX 6000 · Desktop

AMD Radeon RX 6600 XT

The AMD Radeon RX 6600 XT is AMD’s desktop graphics card with 8 GB of GDDR6 memory, 2,048 shading units and a boost clock of 2589 MHz.

Radeon RX 6600 XTIllustration

Drawn from this part’s own specifications. No openly-licensed photograph of the AMD Radeon RX 6600 XT exists, so this is an illustration rather than a photograph.

Overview

The AMD Radeon RX 6600 XT is AMD’s desktop graphics card with 8 GB of GDDR6 memory, 2,048 shading units and a boost clock of 2589 MHz. These are the manufacturer’s published figures. They describe what the chip is designed to do, not what your particular machine does with it, and the gap between those two is usually cooling. A boost clock is a ceiling rather than a promise, and how long a graphics card holds it under continuous load is the one thing no specification sheet can tell you.

Specifications

Architecture
Not verified
Shading units
2,048

Comparable within an architecture. Across vendors or generations it is not a like-for-like count.

Base clock
Not verified
Boost clock
2589 MHz
Memory
8 GB
Memory type
GDDR6
Memory bus
128-bit
Game clock
2359 MHz

AMD's typical clock while gaming. A different quantity from a base clock.

Compute units
32
TDP
160 W

Board power, not measured draw. A laptop GPU's power is a range the laptop maker chooses within.

Process
Not verified
Launched
2021-08-11

Sources

Each figure, the label its source printed beside it, and the day it was read.

FigureAs printedSourceChecked
Shading units2,048Stream Processorsamd.comSpecification page
Boost clock2589 MHzBoost Frequencyamd.comSpecification page
Memory8 GBMax Memory Sizeamd.comSpecification page
Memory typeGDDR6Memory Typeamd.comSpecification page
Memory bus128-bitMemory Interfaceamd.comSpecification page
Game clock2359 MHzGame Frequencyamd.comSpecification page
Compute units32Compute Unitsamd.comSpecification page
TDP160 WTypical Board Power (Desktop)amd.comSpecification page
Launched2021-08-11Launch Dateamd.comSpecification page

Measured on SystemCheck: not enough runs yet. Run the test to add yours.

Compare

The 6 nearest graphics cards in the same segment, each with a published side-by-side.

Every figure on this sheet is a design target. None of it is a measurement.

Nothing above describes how a graphics card behaves twenty minutes into a sustained workload, which is where two chips with nearly identical specifications routinely diverge. A boost clock is a ceiling the vendor permits, not a rate the chip sustains, and whether it holds depends on the cooling, the case, the power profile and the room. None of those appear on a specification sheet.

We deliberately do not reduce these figures to a single score. A composite invented from specifications would look authoritative and measure nothing, and choosing the weights would be choosing the winner.