All optical drives use the same device drivers. You won't find an update on the Dell site or anywhere else. And by the way, anyone who suggests updating the drivers is not providing good advice. Since it's both drives, I don't suggest trying to update the firmware.
I would grab one of the many free burning programs, like ImgBurn, and see if that works better.
One thing to check. When you reinstalled the OS, did you change the SATA mode in the BIOS? Normally, AHCI or RAID is faster.