Your PC uses 60w idling? Is that with screen? It's not too much in that case. CPUS and GPUS have gotten a lot better at idle power consumption, and PSUs are also quite efficient these days.
Downvolt and downclock your RAM when possible.
Turn off VRM phases when not needed (also on the GPU; RAM should be handled properly already on it).
Allow package-C6.
Turn on PCIe power saving stuff.
There is a bunch of stuff that mildly hurts performance and greatly improves efficiency in intermittent workloads, by letting hardware sleep/power-off when not needed.
[1] https://hardforum.com/threads/killawatt-owners-whats-the-idl...