Just got a K7T Pro with a 900 TBird running. Had no problems what so ever. Only crash I experienced was when I tried to run my Micron PC133 CAS 3 memory at CAS 2. Didn't plan to OC, but I am currently running at 963MHz, and haven't had any problems. CPU temp hasn' been over 38 deg C.
K7T Pro
Athlon TBird 900 (Retail version Heat Sink/Fan)
Artic Silver Thermal Compound
IBM GXP75 30GB
Matrox G400
Pioneer 16X DVD
Linksys 10/100
Advansys 3950UA SCSI card for Yamaha CD-RW drive
Builtin AC97 sound (for now)
Antec KS-188 case with 3 fans