sata to pata adapters on p4c800

well I have a pc-dl asus ( basically a dual p4c800 , I figured I would get
more replies this way)
and I am running raid off the pata promise ( single channel) and the
performance is supposed to be better if I go off the promise sata or one
sata and one pata . However I don;t want to buy new drives is worth getting
one of those adapter things , I haven't found anything specs on the web and
no comparision of these adapters saying which is best.
I do a little video editing and occasionally I am pushing the drive, so
would it be worth it to get more performance
right now the drives are maxing out at 133 Mhz ( weird how it is that exact)
when I do a par repair

any recomendations


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