http://www.asus.com/support/faq/qanda.aspx?KB_ID=81828&SLanguage=en-us
"What is the largest hard disk drive which P3V4X can take?
P3V4X should have no problem supporting 100GB HDD (Tested with
Maxtor) using BIOS Version 1005 or later.
http://www.asus.com.tw/support/down...=2&l3_id=2&m_id=1&f_name=pv4x1063.zip~zaqwedc
"
http://www.asus.com/support/faq/qanda.aspx?KB_ID=81765&SLanguage=en-us
"What is the maximum hard disk capacity which P3V4X can support?
In theory, P3V4X can support HDD less than 127GB. When we tested
it with 100GB HDD we've found no problem. Please update your BIOS
to v1006.002 or later from:
ftp://ftp.asus.com.tw/pub/ASUS/beta/mb/bios/p3v4x1062.zip"
Asus seems quite insistent that drives up to 128GB are supported.
The Asus FAQ doesn't state what will happen, if the drive is larger
than 128GB.
Perhaps a nice PCI IDE controller, like PROMISE "ULTRA133 TX2" will
support the whole drive for you.
Paul