How did you get from 700 to 900?
You either did
a) upped the bus frequency from 100Mhz to something else via the bios or dipswitches
or b) changed the multiplier via the dipswitches
or c) a combination of both
i would be surprised if you did just a , as that would mean that u upped the cpu bus to 128 Mhz, which i doubt would be able to boot. (the highest I got bus to go to and still boot was 111Mhz)
You probably did b , changed the Mhz by the multiplier settings, which means that the L1 bridges are already unlocked.
So if you did just b, and you want a little more, then you could possibly add a bit of a) which is up the cpu bus a little from 100MHz, either by changing in the bios or changing the bus dipswitches....
nice job on the voltage...
do a search for the program called wcpuid,
it's a small program that'll tell you cpu speed, bus speed and multiplier settings
hope some of this helps
ps right now i'm running tb 800 @ 950 100Mhz x 9.5 with GW FOP38 fan, temp idle around 33-36