You can identify what voltage a card can use by looking at its edge connector (where it connects into the slot) and identifying the location of the the key notch.
PCI, PCI-e, AGP
There is no PCI RAM, but we have a PCI card to which we can connect more that one RAMs to that PCI card
There are several different expansion slots that are compatible with video adapter cards. PCI, AGP, and PCI-Express x1 are all formats that are rarely used these days. The most popular format at the moment is PCI-Express x16.
Can it? Sometimes, in PCI 3.3V slots(PCI rev. 2.2 or newer).But should it? No, a PCI-X card should be not be inserted into PCI slot.Putting a faster card(e.g., PCI-X, 64-bit/133MHz) into a slower slot(PCI 2.2, 32-bit/33MHz) will force the card to transfer data much slower than what it is capable of doing.IOW, even if PCI-X cards sometimes work in PCI Revision 2.2 or newer slots it is pointless to do that since it defeats the purpose of having a PCI-X card, namely wider bandwidth. PCI-X(133MHz) cards are capable of approx 1.0GB/s transfers while PCI (32-bit/33MHz) can only handle approximately 0.1GB/s, theoretically. In reality both do somewhat less ... but putting a 1.0GB/s card into a 0.1GB/s slot is wasting perfectly good bandwidth(and the money spent to get it!).If you only have PCI(32-bit) slots, then buy only PCI(32-bit) cards.All PCI cards that adhere to PCI revision 2.2 or newer specifications can be used in PCI-X slots. ( Note that most cards are now manufactured to meet PCI 2.2 or 2.3 specifications. )However the transfer rate/speed will not necessarily increase because the card is in a slot capable of faster transfers.PCI slots that are older, prior to PCI rev. 2.2, should physically block the insertion of a normal PCI-X card into the slot.PCI cards that are older, prior to PCI rev. 2.2, should be physically blocked from being inserted into PCI-X slots.Both of the latter of course depend upon the manufacturer of the expansion card following the PCI specifications. Unfortunately not all manufacturers do that(so be careful!).As always there are various additions and exceptions but confusion is the general rule when they are considered so let's leave it as:Long card in short slot: no, it wastes bandwidth and money.Short card in long slot: ok, if it inserts without undo insertion force(but it also wates available bandwidth).
PCI, PCIe.
Expansion cards are generally installed in PCI or PCI-e slots on the motherboard, although it would depend on which type of expansion card you are referring to.
A good data transfer rate for a PCI expansion card is between 200 and 400mbps.
it will be written in the upper left hand corner of the cardYou can also tell by the location of the notches on the bottom of the card.A notch in a PCI slot distinguishes between a 5-V slot and a 3.3-V slot. A Universal PCI card can use either a 3.3-V or 5-V slot and contains both notches. Conventional PCI now has four types of slots and six possible PCI card configurations to use these slots.
A PCIe x16 graphics card will not work in a normal PCI slot. PCIe or PCI Express is a new standard in expansion interfaces. PCIe is physically and electronically incompatible with PCI slots.
Inside the Case there will be a card Plugged into the PCI or AGP slots. If your VGA/DVI cable plugs into a card in the expansion slots then your card is removable. If not then it is on the motherboard and shares system resources
A Mini-PCI or Mini Peripheral Component Interconnect is a smaller version of the PCI expansion port.
PCI
pci express or AGP
The sockets on the outside of a computer that plug into an expansion card are called ports. Depending on the expansion card, there can be a variety of ports including USB, audio and network ports.
A network interface card can be connected to a standard PCI slot or PCI-E slot. The choice of what slot to use is up to the person building the system and also based on what expansion slot is unused.
Find out the make and model of your Motherboard, Then check on their website to see the specifications of it and see what expansion card slots it has.
The expansion slot is the socket on the motherboard that can hold an adapter card. There are different types of expansion slots (pci, pcie, pciex16) so you need to check that the expansion is the same kind as the adapter card.