this post was submitted on 28 Nov 2023
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and still high idle power usage (cant get mine under 15w) my nvidia / amd cards idle around 4-5w even with screen attached.. (im using a a380 in a server for video encoding/decode)
You can get it to 1w with 12th gen+ cpu with iGPU
https://www.reddit.com/r/IntelArc/comments/161w1z0/managed_to_bring_idle_power_draw_down_to_1w_on/
iGPU just bypasses the dGPU. That shouldn’t be necessary.
You can also do this with Nvidia and AMD GPUs, kinda the whole way laptops work to conserve battery is to just shut off the dGPU when not in use.