I read some info in some threads here that indicated that maybe I should uninstall the nvidia SW IDE drivers that are installed with the nforce package (I own a nforce3 Ultra mobo, and a 3520A), and use microsoft's instead. However I couldn't find any detailed info about it.
As of today I have zero problems burning, burn times are consistent and I don't have too much cpu usage or buffer drops.
Any specific thread I should look into? Maybe some information on this matter should be added to the NEC FAQ.