"other symptoms evident" - what other symptoms please.
Latency times are not standard settings anywhere, AFAIK. There are many different types of latency - PCI-IDE latency sems odd, as it talks about two different things - are you using a plug-in IDE controller, or the standard motherboard sockets?
Just out of interest, read this article - but note it's for general info only, and not about your chipset. click here
And this rather non-conclusive thread click here