I just got two T-bred 1800's and a T-bred 1700 from Newegg today. The T-bred 1700 was a T-bred B, but the 1800's were T-bred A's. I'm testing them all right now. The dual 1800 A's are in a MSI K7D Master and are humming along at 1875 MHz (12.5*150 FSB @ 1.725 Vcore) right now. 150 FSB is as high as this motherboard goes, so this is as high as I can test them. The T-bred B 1700 is in a Shuttle AK35GTR2. This is a KT33 chipset, but the board doesn't seem to have a 1/5 divider, or it's unwilling to kick in. So far, I have have run it up to 1875 MHz (12.5*150 @ 1.725 Vcore), but I'm trying for 12.5*155. It hasn't happened, yet. I've taken it up to 1.80 Vcore. *EDIT* It seems to be stable, now at 12.5*155 @ 1.85 Vcore. *EDIT* I'm testing at 1999 MHz @ 1.85 Vcore, now. So far, so good. 2012 MHz @ 1.85 Vcore failed Prime95.
BTW, dually owners, dual SK-7's are just barely keeping up with these puppies with 50CFM fans an an open case, I'm running 48-54C on them. The single CPU rig is fine. It's got a Speeze 5R265B1H3G cooling it to about 45C.