My power supply has one cable with 3 sata connectors on it. Can I connect my disc drive and hard drive on the one cable? My PSU also has a cable with 3 four pin molex connectors on it and my case has 3 fans. Can I connect all my fans to that one cable with all the molex connectors on it?
Yes to both questions. It doesn't matter whether you're connecting only harddrives to that cable or only diskdrives (aside from the fact that these are usually located a little apart from each other.) You can combine both and they will work. As for fans... If they have the molex connectors rather than standard 3-pin fan connectors, you can connect them for sure. Depending on what power supply you have, you'll probably have anywhere from 18-30amp on your 12v molex rail. Harddrives will take under 2amp, and depending on what fans you have, they'll use anywhere 0.5-3amp, so even if you have 3 extremely powerful fans drawing 3amp each (3 x 3amp = 9amp), you can safely connect 6 of such monster fans to that 12v molex rail. To be honest, I haven't met too many of such fans - most standard 120mm fans, even with leds, will use no more than 1.5amp. 80mm fans non-led fans will use about 0.3-0.5 amp. If you have a very powerful psu with 30amp on 12v rail and hundred of 80mm fans, in theory you can run all of them. In practice, I'd like to see that :)
