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RTX 3090 x2 vs RX 7800 XT

Best verified output tok/s per model (single-stream generation). Hover a value for the quant.

Verified data on this pair is thin — most of the board is still pending review. Submit your own run and help fill the matrix: one prompt, three steps, no downloads.
RTX 3090 x26 verified runs · best 240.8 tok/s
RX 7800 XT1 verified run · best 42.0 tok/s
ModelRTX 3090 x2RX 7800 XT
Qwen3.6-27B240.8 AutoRound INT4
Qwen3.8-27B219.8 AutoRound INT4 + fp8 KV42.0 Unsloth-Dynamic-IQ4_XS
NVIDIA-Nemotron-3.5-Lightning-30B-A3B197.0 NVFP4
Qwen3.8-Flash-Next-REAP-256-duo53.5 Unsloth-Dynamic-Q3_K_XL
Qwen3.8-Flash-Next40.1 Unsloth-Dynamic-IQ3_XXS

Head-to-head (models tested on both): RTX 3090 x2 1 · RX 7800 XT 0 · tied 0 · data as of Sep 23, 2026. Full rules: methodology.

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