You can probably get away with 1/1. My Abit board doesn't switch to 2/3 (with auto-setup) until the bus speed hits 92mhz (which is way out of spec).
If you have any troubles, switch it back to 2/3. Simple as that.
BP6, C-366/550 (x2 very soon), 320meg
CL TNT2U 180/230
BP6, P3-700@770 (for now), 320mb, eVGA MX Plus (dual CRT), waiting for VIVO module
Most AGP cards have no problem with 83 MHz, so set it at 1/1. Until a recent upgrade, I was running an old Slot 1 366 Celeron at 458 for around nine months with an ATI Xpert Rage Fury 128 16 MB video card. The video card and everything else in the box (WD Caviar HD, CL SBLive, Memorex 1622 CD-R/CD-RW, USR 56K WinModem, PC66 10ns SDRAM) all worked perfectly. No crashes, no failures, nothing but total stability. Really, 83 MHz ain't that scary.
Edit - Just saw and answered your other post. Those sound like symptoms of an AGP bus overclock problem. So, maybe you do have to set the AGP divider to 2/3 and lower the clock rate to 55 MHz. But, as I said there, it's pretty pathetic if such an expensive and highly regarded video card can't handle 83 MHz. O/C'ed Coppermine systems are running the FSB at 150 MHz, pushing the AGP clock to 100 MHz. Maybe you should just return it for a TNT2 Ultra or Matrox G400 Max.
[This message has been edited by Dave_B (edited 02-08-2000).]
well when I also called Guillemot (pronounced Ge-mo) they didn't seem to surprised, and in fact the tech I talked to told me, "Well, don't overclock it than, and even the memory @ 150 isn't that much of a difference from 166, at least you can't notice it."
Celeron 533 @ 600
196 Meg. PC 100
Guillemot Prophet GeForce DDR
Aureal 1 Soundboard
19" NEC Multisync Monitor