K7VTA3 v3.x maximum CPU and HDD supported information as below,
HDD:120G
CPU: AMD Duron 200Mhz FSB CPU - 950
           AMD Morgan 200Mhz FSB CPU - 1.1G 
           AMD Athlon 200Mhz FSB CPU - 1.4G AMD Athlon 266Mhz FSB CPU - 1.4G
           AMD Palomino 266Mhz FSB CPU - 1.2G
           AMD Athlon XP (0.18u) 266Mhz FSB CPU - 2100+ AMD Athlon XP (0.13u) 266Mhz FSB CPU - 2600+

The Promise chip on K7VTA3 can support RAID 0 or 1 only.

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Yes, the K7VTA3 V1.0 comes with VIA 8235 chip which supports USB 2.0.

K7VTA3 doesn't support ATI Radeon 9600 Series VGA Card due to hardware limitation.

K7VTA3 could not be disabled RAID function by Hardware or BIOS setting.