Power off video card until reboot from command line?

I have "headless" machine with video card, I use very rarely, only if I want physical access to it. The cooler of this video card became old and started to produce bad noise. Can I disable this video card in such a way, that it: 1. will turn on again on reboot 2. a cooler stop to rotate I did: lspci | grep VGA sudo lspci -vs 01:00 To know it's module then I put: blacklist radeon into: /etc/modprobe/blacklist.conf But, this didn't work. How to accomplish this?