I have a gigabyte p55 ud3 and there is like 6 sata slots. I plugged my first hard drive in the sata 0 then the other should go in 1 then 2? or are there any particular slots it should be in for 3 hard drives. and one cd rom.
More aboutwhich sata slots plug hard drives
Doesn't matter if you're not using RAID 0. I'd probably just use the first slots first to keep it straight.