NVIDIA RTX 4070 Super

reported speed:

18.0 tokens/s generation · 500-600 tokens/s prompt processing

quant:

IQ3_S (GGUF)

kv:

q4_0

Reported by the source; GPU count, offloading and concurrent requests can change this figure. Check the full setup before comparing.

User reports Qwen3.8-27B at ~18 tok/s decode and ~500-600 tok/s prefill at 64k context on an RTX 4070 Super 12GB with 32GB system RAM. Setup is stock llama.cpp with an ISTA-DASLab GSQ-RCO IQ3_S quant (~11GB), q4_0 KV cache, -ngl 58 and token_embd offloaded to CPU. Only 16 of 64 layers need KV cache, so 64k context takes about 1.1GB instead of 4GB at f16. The same recipe works with 0bserverx' Qwen3.8-27B-Heretic-GSQ-RCO IQ3_S quant at about a 7% speed loss. User calls GSQ-RCO the best Qwen3.8-27B quant tested and says it performs close to full precision.

reported speed:

110.2 tokens/s generation

quant:

IQ4_XS-4.19bpw (GGUF)

kv:

Q8

mtp (multi-token prediction):

on

Reported by the source; GPU count, offloading and concurrent requests can change this figure. Check the full setup before comparing.

User benchmarks llama.cpp at 89.76 t/s against ik_llama.cpp at 110.24 t/s on Qwen3.6-35B-A3B with MTP. Setup is the IQ4_XS quant on a Ryzen 7 9700X running CachyOS, with the GPU used as a secondary card and the iGPU for display. The ik_llama.cpp run is a 23% speed increase.