if you have any old ASIC 5-10-15-20-30 Gh, you can use it for MED mining
start MED bfgminer with option: --http-port XXXX
and point your miner to ip:port XXXX , you can use any regular miners soft which support your miners, PC will reduce asic speed when reach bottle cap
this is discussed already here long time ago
I haven't any old asic miner unfortunately. Trying with 2 block erupters, I'm having few accepted shares. When I can, I'll use a new hub with supply and any greedseed.