I could get my duron 700 to run at 1ghz, but when running Prime95 I ran into errors, even at 1.85v. So I just put it down to 900, and it runs fine there, at 1.6v. I'd try for 950, but I would have to raise the voltage significantly, and my case has limited cooling capabilities, so I'm just going to let it be. If I could do it again, I would buy the duron 600 instead of the 700, as Bubba says.
Duron 700@900 Asus A7V 1003
128mb PC100 WD 30gig ata 100
prophet II mx