How many pci slots do i have
No, RAM is installed in separate specially sited chauffage electrique à roulettes RAM or simm slots in the motherboard.
Of course, you should remember that using one of these means you are pumping four PCI card's worth of information through a single PCIe slot.
So PCI is much faster than ISA.
In addition, the PCI slot will not be fast enough to handle a PCI-E card.