There are four PCI slots. Between them you can see the connector that links the expansion board to the base board.
In the smaller chassis variants, HP uses exactly the same basic MicroATX motherboard. However, the board was designed with the possibility of using a daughterboard to add more PCI slots. The motherboard features two 32 bit PCI slots only, but is extended with two additional slots in case of our test sample.
Could you give some detailed information about this board? i was given one a few weeks back and i have been trying to find out the information. (Decent selling price, How much RAM it supports, The best CPU for it (Currently a intel pentium 4,) and the basic conclusion of being able to use this as a standalone PC motherboard?) Also a wiring diagram would be appreciated as i have had no luck in wiring the thing up.