I have had two liteon 1633s drives and a hp 640i drive. All three fail data burn discs that fail data verification more than half the time. I replaced the IDE cables, and ran windows memory check. The new cables didn’t help, and the memory test ran for hours without an hour. I checked the BIOS and the 12+ voltage was at 11.5. I installed speedfan and watched the voltage as I burned two more disks it dropped to 11.44 a few times which is right at the edge of -5%. Both of these discs cam out find. I’ve kept track of when the voltage drops and will try to match it too an error.
Does it seem reasonable that the power supply is the problem since it is right on the edge of operating limits?