I am using an Intel 875 motherboard with two 160G Maxtor SATA hard drives, 1GB of memory and a Pioneer DVR107-D. I am using cheap 4X DVD-Rs from Digital Matrix and initially thought that they were the reason that I am getting freeze-ups on my burned DVDs about 2/3 of the way through. I was using DVD Shrink straight to the burn. I thought maybe it was DVD Shrink, so I rendered to disk and then used Nero 6 for the burn. Still had problems burning at 4X. Burning at 2X works fine. I did a speed check in Nero without writing, and found that the read speed was too low to burn at 4X. It appears that my computer is not providing the data fast enough. I looked for Use DMA if available and turned that on for the IDE controllers, but there is no DMA for the SATA drives. Does anyone have any idea why I am getting reading speeds that are so low?