Might be..., but it isn't the case.
Before I removed the ASPI, I burned several media "-R" (RITEKG04, SONY04D1) and "+RW" (PHILIPS041).., and I've a lot of problems.., errors with Nero and RecordNow (four -R media to the trash in one day), bad Kprobe statistics, problems with BookType utility (error at start)..., I didn't know what happen..., I verified DMA, IDE drivers, IDE cables..., all OK, but the problems were continuing.
I was using the US0N w/Omnipatcher, then I returned to US0N "official" and the same problems.
Finally I re-flash again US0N with FlashFix and I remove the ASPI..., missing problems. No more media for crash, no more errors during the burn process, no more BookType errors, and good Kprobe statistics...., now the 812S is a great value.
I used nforce2 Ultra400 board (since doggie)..., this it is the reason of my "recommendation"...., probably it doesn't work..., probably it works ok..., I don't know, but it's only one more simple test, and doggie doesn't lose anything for do it.