Hi guys! I'm new in the Bitcoin business. I built a PC from old components wich I got from other people who didn't use them anymore. After the Christmas I want to buy an ASIC Miner to start mining. Should I connect it to that very weak PC (CPU: Single Core with unknown frequency; GPU: Integrated on the motherboard, 32MB of RAM.) or to my better and new PC?

I suggest looking at SP20 and S4 currently. Neither one requires a computer except for setup. Days of needing a computer for GPU/CPU are dead for most.