Keep in mind folks that default settings, whether they are "performance" settings or not, aren't always the best bet. Depending on the type of RAM, processor, video card, thewse things can have adverse effects.

My first bit of advice to you would be to learn how to reset your bios back to the default without having to enter into BIOS (hint-there's a jumper, usually). In my much earlier years I had a tendency to make my motherboard not respond and I had to switch a jumper to reset everything. Having to learn by myself with no Internet at the time you can imagine how many times I had to use that little jumper.