Nope. I tried. You can use a hot wire to trick the PCIE slot. Try to find it on Google. I am on my phone right now. So searching is a pain. Look for PCIE A1/B17.
Bleep. This is for detecing only. Not shure if it will power on a card aswell. Check your BIOS settings for power saving on the PCIE lane. That could work.