this may help.  you can connect LED strop controller to Dell mobo USB 2.0 header. and this one discusses power for LED strip.  you may need to adapt optiplex SATA power to get 5V or this one for LED power.
[IMAGE]This is my new optiplex.   Ive seen on youtube people putting LED strips in optiplex Mid towers, could anyone link me a strip for the 3010 Mid tower and maybe the adapters?    Many thanks, James
I bought a Dell Optiplex 3010 MT How can i put a LED strip in it?