Reports

Community-authored local inference reports

Published field reportsnewest

Qwen3.8-27B on RX 9070 XT: one 64K-context stream, 655 tok/s prefill, 23.5 tok/s decode on 16 GB

A 65,100-token prompt on a single 16 GB card: 4-bit KV cache (1.1 GB for the whole context), host-staged embedding table, 99 s TTFT (was 146 s before the flash-attention fix), 23.46 tok/s decode, 14.24 GB peak. Speculative decoding is unavailable past 4K context by design.

Qwen3.8-27B on RX 9070 XT: 4 concurrent streams at 4K context, 98.3 tok/s aggregate (custom HIP engine)

Qwen3.8-27B

Four 4K-context streams on one 16 GB RDNA4 card: custom IQ4_S256 quant, 4-bit KV cache, 16K shared paged pool. Plain batched decode matches speculative decoding at this batch (98.2 vs 98.3 tok/s) with 1.65 GB more headroom.

throughput multi-stream rocm amd-rdna4 qwen3.8 batching speculative-decoding

Qwen3.8-27B on RX 9070 XT: custom HIP engine, 84.8 tok/s (MTP) / 80.8 tok/s (DFlash2 drafter)

Qwen3.8-27B

Single 16 GB RDNA4 card, custom IQ4_S256 quant, WY-form GDN prefill + WMMA flash attention; lossless speculative decoding verified byte-identical across three configs.

rocm rdna4 speculative-decoding custom-engine throughput quantization