How high can I take an xp1800 in theory of course

[iam4u2nv]

Here is what I have

SOYO SY-KT333 DRAGON Ultra (Platinum Edition)
AGOIA 1800XP
256 Meg of Crucial 2100
PNY Verto TI4600
Atlas IV seagate 60 Gig
Sound Blaster Live 5.1
Toshiba DVD
Ricoh DVD+RW
fans are
Antec 80mm case fan 38cfm in the back
Antec 80mm case fan 38cfm in the front
and a Dr Thermal 70mm Proc fan