I just installed Leopard on my 1.83 C2D Mini. At the same time, I also upgraded the HDD, and added 2GB RAM. I powered everything up, and from the get go, the ran was running at its maximum. Installing Leopard took about two hours. Today, the system performance is horrible. I ran hardware tests and the HDD and RAM both appear to be perfectly fine. Something is clearly wrong with this machine, as it is horribly slow, and the fan sounds like a harrier. I tried looking through goolge and MR, did not come up with anything. Any ideas?