adiahha :
hi.
I have a server dual xeon board and I just discover it does not have 16x pcie only 8
I found on ebay adapter from 1,2,4,8 to 16 will it work with my quadro fx580?
Most server motherboards use 16x slots, even if only 4 or 8 PCIe lanes are connected. The full width slot allows all cards to be installed in the motherboard even if they are unable to negotiate a full width link speed.
For example, it is possible to insert a PCIe 1x card into a PCIe 16x slot. It will not latch in, but it will run at PCIe 1x. The same is true for PCIe 4x and PCIe 8x cards.
The converse is also true. A PCIe 16x card can be cut down to fit into a PCIe 1x, 4x, or 8x slot (don't do this), and it will work. This can be tested without cutting the card...