I brought a Tbred-b processor AXDA1700DUT3C with a giga byte 7vax with kt400 chipset. The bios allows you to change the multipler via switches and via the bios menu.
1) Do I have to make any modifications to my processors to change the multiplier settings? If I have to, how do I do it?
2) Is the fsb locked? If so, can I change the fsb to 166 mhz, I believe the motherboard supports 166 fsb.
With a T-Bred B, the multiplyer should be unlocked. You should be able to adjust this in the BIOS. As for the FSB, well, that is unlocked in almost any chip, and is for yours. It should also adjustable from your BIOS. Enjoy your OC'ing fun!
You need to modify the L5 bridhes. Go to the CPU overclocking question and ask a question about higher multipliers of a Tbred B and then it is very likely someone called 'phosstpok' (sp?) will reply to you telling you everything you need to know.
Actually, I was able to overclock past 12.5x multiplier without modifying the L5 bridge. This processor is the retail version of the athlon xp. Guess this processor is really unlocked. The motherboard wasn't what I expected because I can only change the multipier via jumper.
Actually, I only know that the Abit NF7-S opens all multipliers, even for low-end Tbred B's like XP1700+ (as long as it is unlocked, L1's closed).
The Asus A7N8X (and deluxe) don't open the higher multipliers for Athlons with multipliers of 12.5x or less. I don't think (not sure) A7N8X opens the lower multipliers for Athlons with multipliers of 13x or higher.
Don't know about any other nForce2 boards.
<b>99% is great, unless you are talking about system stability</b>