The OEM thing shouldn't matter in connecting the HDD and optical drive. You can check to see whether they use PATA (IDE) or SATA. That motherboard, a nice one BTW, allows for two PATA (IDE) devices to connect to it in addition to six SATA devices. Looking at your build list, the description for the HDD you are referring to says it is a SATA drive. I don't know which optical drive you want but a SATA drive would be best in terms of performance. All OEM means, in this case, is that you will get the drive and nothing else, no instruction booklet, no screws, no added accessories, nothing. The necessary data cables should come with the motherboard.
Edited by DJBPace07, 16 August 2009 - 08:58 PM.