The Keyboard Power on function only works when the system is shutdowned using software method. It does not work when you select the delay-4-seconds shut down. This is a chipset limitation.(JP2 jumper setting short pins 2-3)
No, please don't mix SDRAM and DDR memory modules at the same time. Otherwise, the motherboard may be damaged.
Yes, the P4VXASD2+ V5.0 supports hard drive capacity up to 160GB.
The P4VXASD2+ V5.0 does not support fast write on AGP.
Please use DDR266/333 512M with 16 chips type DDR on P4VXASD2 V5.0 M/B.