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RX 6900 XT vs RX 9070 XT

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Best sourced output tok/s per model (single-stream generation) — engine and version, quantization, context and a source link on every row. Hover a value for the quant.

Sourced data on this pair is thin — most of the board is still partial. Submit your own run and help fill the matrix: one prompt, three steps, no downloads.
RX 6900 XT2 sourced runs · best 346.1 tok/s
RX 9070 XT3 verified runs · best 545.3 tok/s

Specs and evidence

RX 6900 XTRX 9070 XT
VRAM16 GB16 GB
Sourced runs on the board23
Models measured23
Best output tok/s346.1 tok/s545.3 tok/s
Highest measured peak VRAM——
Street price (latest snapshot)——

Sourced rows only. Peak VRAM is recorded by the person who ran the benchmark, so it is a floor for what the card can hold, not a specification. Price snapshots.

Head-to-head

On the 2 models measured on both cards, RX 6900 XT leads on 0, RX 9070 XT on 2. The widest gap is on LFM2.5-350M: RX 6900 XT 275.8 tok/s vs RX 9070 XT 437.7 tok/s (RX 9070 XT 59% faster).

The measured matrix

ModelRX 6900 XTRX 9070 XT
Qwen3.5-0.8B346.1 MQ4545.3 MQ4
LFM2.5-230M—481.8 MQ4
LFM2.5-350M275.8 MQ4437.7 MQ4

Head-to-head (models tested on both): RX 6900 XT 0 · RX 9070 XT 2 · tied 0 · data as of Oct 17, 2026. Full rules: methodology.

Related reading: RTX 5090 vs 3090 · quantization · Value index · Full board

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