"This BIOS feature allows you to enable or disable DMA (Direct Memory Access) support (if available) for the Master IDE device attached to that particular IDE channel. For easy reference, here is a table of the different DMA transfer rates and their corresponding maximum throughputs..."
Any major computer upgrade generally requires a full software reinstall too. No so if you heed the advice in the guide to Upgrading a Motherboard without Reinstalling. PCSTATS Tips