From bed3cb0833b60488c9ba14d85694f96dcf07b24e Mon Sep 17 00:00:00 2001 From: lin-bot23 Date: Sat, 18 Jul 2026 06:10:10 +0800 Subject: [PATCH] docs: add FP8 format explanation to startup-flags page --- development/comfyui-server/startup-flags.mdx | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/development/comfyui-server/startup-flags.mdx b/development/comfyui-server/startup-flags.mdx index 8b6da247f..857682a3e 100644 --- a/development/comfyui-server/startup-flags.mdx +++ b/development/comfyui-server/startup-flags.mdx @@ -106,6 +106,10 @@ python main.py --disable-auto-launch | `--fp8_e5m2-unet` | Store UNet weights in fp8 (e5m2). | | `--fp8_e8m0fnu-unet` | Store UNet weights in fp8 (e8m0fnu). | + + **FP8 format differences**: `e4m3fn` (4 exponent bits, 3 mantissa bits) balances precision and dynamic range, making it the most commonly used FP8 format for model loading. `e5m2` (5 exponent, 2 mantissa) favors wider range at the cost of precision. `e8m0fnu` (8 exponent, 0 mantissa) maximizes dynamic range but is not supported on all hardware. + + ### VAE precision | Flag | Description |