FLUX.1 offloading versus no-offloading VRAM matrix
Fresh ComfyUI process per cell; total physical-GPU memory sampled every 20 ms under the exclusive GPU lock.
--highvram is the no-model-offloading control; it is not --gpu-only.
| Policy | Pipeline | Status | Cold peak MiB | Warm peak MiB | Maximum peak MiB |
|---|---|---|---|---|---|
| lowvram | Original BF16 | success | 24091 | 23650 | 24091 |
| lowvram | Partial INT8 | success | 20351 | 20016 | 20351 |
| lowvram | Partial INT4 | success | 16642 | 16604 | 16642 |
| lowvram | Paper Mixed | success | 12066 | 12050 | 12066 |
| lowvram | Paper W4A4 | success | 10765 | 10797 | 10797 |
| lowvram | Whole W8A8 | success | 16298 | 16298 | 16298 |
| lowvram | Whole W8A8 + INT8 T5 | success | 16265 | 16265 | 16265 |
| highvram | Original BF16 | capacity_failure | 23939 | 23939 | |
| highvram | Partial INT8 | success | 21342 | 21342 | 21342 |
| highvram | Partial INT4 | success | 21438 | 21438 | 21438 |
| highvram | Paper Mixed | success | 20062 | 20158 | 20158 |
| highvram | Paper W4A4 | success | 18942 | 18974 | 18974 |
| highvram | Whole W8A8 | success | 21342 | 21342 | 21342 |
| highvram | Whole W8A8 + INT8 T5 | success | 19966 | 19998 | 19998 |
GPU UUID: GPU-27ff99d6-d77d-2226-a4b5-7a11b8ef6bdd
Settings: 1024×1024, batch 1, 20 steps, Euler/simple, CFG 1.0, Flux guidance 3.5.
Source benchmark state: measurement complete, run 20260719T215033Z_1143248. The benchmark used total physical-GPU memory because WSL did not expose per-process memory for compute rows.