I believe you have an integrated video display, it's hardwired to motherboard. Unless it has PCI-express specifically built on mobo I would say no. You can put PCI card assuming you have a free slot. cheers.
Short of buying a new motherboard it is not possible to fit a PCI-Express graphics card in a Dell Dimension 1100.
Only graphics cards are inserted into a PCIe x16 expansion slot.
PCIe
PCIe or USB 2.0 bus standards.
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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.
A card which goes in a special slot in your computer
I presume that you mean to ask whether a PCIe 3.0 card can be used in a PCIe 2.0 slot on your motherboard. The answer to that question is yes. PCIe standards are all backward-compatible, so do not sweat that. For best performance, however, you would prefer to put a PCIe 3.0 card in the same type of slot.
When you insert a PCI Express 3.0 card into a PCI Express 2.0 slot, the card will still function, but it will operate at the lower speed of PCIe 2.0. This means it will have reduced bandwidth compared to its capability in a PCIe 3.0 slot. However, the compatibility is maintained because PCIe is designed to be backward compatible. Overall, while the card will work, you won't benefit from the higher speeds that PCIe 3.0 offers.
Witchcraft! No, in all actuality it will work completely fine, as long as they are both indeed PCIe. You should be good to go!
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