Hi all. Last night I began casually looking at computer parts to add to a potential new PC, and I found myself itching to build my own computer (for the first time) and doing hours of research and shopping on Newegg and Google. Now I just have some questions regarding the hardware.

I'm looking at internal card readers and front interface panels (with at least USB and audio ports). Some units are combined, in other cases I'd need separate readers and interface panels. Either way, each unit seems to have two SATA and usually three nine-pin power connections. Is this normal? The motherboards I've been looking at wouldn't be able to power one of these units, a hard drive, and a DVD drive, because they seem to all have three such power connections. Am I missing something here, or is there an alternative to these seemingly overkill interface panels?

I've been looking at wireless adapters, but I can't find any with internal antennas. As far as I know, prebuilt desktops with wireless cards have internal antennas. Can I find adapters like those anywhere online?

Are LED lights for power and hard disk usage built into the case? Is there anything special I need to know about those, or is everything in the manuals?