It’s probably more about aggressive default bios speeds. Tweak your c states / bios overclocking / pcie power management / windows power management features. Idle power has gone down on most chips.

The Ryzen 3000 should truly idle closer to 20-30w.

If you have multiple GPUs in your home server you’re probably doing it wrong. But even then, at idle, with no displays connected, the draw will be surprisingly low.

Most systems with some ssd/NVMe, 2-4 DIMMs and maybe a drive or two should idle closer to 50w-60w.

Go tweak your power and fan settings. 100w at idle is way too much unless it’s 15 years old.

Fans, especially small ones are very sneaky energy hogs. Turn them waaay down.