If the engine is really spluttering like a car (if that's what describes it ) I'd have a look for viruses and other malware on the system. I once had this problem with several other game engines and I found out all the EXEs on my HDD were infected with a virus!
As for the Refresh-rate, I haven't got any clue why this popular bug exists in A6. It sure is a directX+nvidia cards issue, nevertheless in other engines, they must have found a workaround...
Formerly known as The Matrix - ICQ 170408644
I've been here for much longer than most people think. So where's my "Expert" status?
) I'd have a look for viruses and other malware on the system. I once had this problem with several other game engines and I found out all the EXEs on my HDD were infected with a virus!