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[AMD] update model in case qwen3.5-fp4-mi355x-sglang - #2465

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[AMD] update model in case qwen3.5-fp4-mi355x-sglang#2465
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@yuzho-amd yuzho-amd commented Aug 3, 2026

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Update the model in case qwen3.5-fp4-mi355x-sglang from amd/Qwen3.5-397B-A17B-MXFP4 to amd/Qwen3.5-397B-A17B-MXFP4-AttnFP8-V2.
This model has quantized attention to PTPC FP8 and shared experts to MXFP4.

This is the end-to-end performance results on MI355:
image

And it needs these PRs from aiter and sglang:

repo PR summary status
aiter ROCm/aiter#4346 fix allreduce acc issue merged
aiter ROCm/aiter#4396 add ptpc tuned config merged
sglang sgl-project/sglang#29723 fuse allreduce+rmsnorm+inputquant waiting for review
aiter ROCm/aiter#4001 update fusedmoe tuned config merged
aiter ROCm/aiter#4025 update fusedmoe tuned config merged

@yuzho-amd yuzho-amd changed the title update model in case qwen3.5-fp4-mi355x-sglang [AMD] update model in case qwen3.5-fp4-mi355x-sglang Aug 3, 2026
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yuzho-amd marked this pull request as ready for review August 11, 2026 14:39
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yuzho-amd requested a review from a team August 11, 2026 14:39

@claude claude Bot left a comment

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Claude Code Review

This pull request is from a fork — automated review is disabled. A repository maintainer can comment @claude review to run a one-time review.

@functionstackx

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stale PR & probably superceded by other PRs. please reopen when ready

@yuzho-amd

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stale PR & probably superceded by other PRs. please reopen when ready

The PRs that have already been merged can get most of the performance improvements.

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