Hello;I have a Gigabyte GA-K8NSC-939 motherboard running Ide drives now,I want to add a Sata Optical drive.There are to settings in bios,1 is to enable Sata.The second is to enable or disable sata dma?. Do I need to enable this sata dma,or leave it disable? Thankyou for any input on this one setting for dvd or blu-ray drive.