Summary
User reports DeepSeek V4 Flash (v4-flash-0731) at about 8 t/s on a single RTX 4090 with 64 GB RAM.
Setup is the Blaze engine with Unsloth's IXQ2/Q3 checkpoint, keeping heavily utilized experts in RAM with the CPU.
Throughput drops to 5 t/s on an expert miss that causes a disk read. Prefill is a work in progress.