SLI motherboards usually have 4 or 5 PCI-E slots, but only 2 x16 slots for video cards. The other slots are usually x1 or x4, which will be used for expansion cards in the future as a replacement for PCI.Originally posted by: Solodays
All SLI cards only uses PCI-E interface? So, SLI cards come stack together when you buy them? There are motherboards with 2 PCI-E slots?
You're right about that, they don't fully take advantage of the bandwidth of PCI-E x16, even with SLI. But I guess they've designed the x16 slots with the future in mind. I don't think there are any video cards that fit in x1 or x4 PCI-E slots.Originally posted by: Solodays
Thought none of the videocards could take full advantage of the PCI-E bandwidth as of now, so basically when combined 2 SLI card together it will take advantage of the PCI-E bandwidth?
Most boards nowadays have a mix of PCI-E and PCI. Take a look at this Asus A8N-SLI Premium for example, you'll see it has 2 PCI-E x16 video card slots, with an x1 and an x4 between them, and then it has 3 additional PCI slots.4-5 PCI_E? 2 x16's for the SLI cards and the others for expansions in the future. but if a mobo has PCI-E expansion slot and no pci, how would you go about installing a PCI device on your mobo as for now since network card, sound cards, tv tuners are all using PCI interface? or perhaps those x4 PCI-E are backward compatiable with PCI?
The other slots are usually x1 or x4, which will be used for expansion cards in the future as a replacement for PCI.