I am going to buy a GTX 680, however I am unsure whether a PCIe 3.0 slot is needed for a Z68 mothernoard. If I get an i5 2500k, which features would my motherboard need and which motherboards these? Also if I want to leave the option open to get a second GTX 680 late on, does the mb have to support dual x16?
All of the Z68 motherboards I look at with PCI 3.0 have a note that says an Intel 22nm processor is required to utilize PCI 3.0. 22nm doesn't arrive until Ivy Bridge, right? So how does a PCI 3.0 graphics card (GTX 680) work on a Z68 MB running Sandy Bridge processors? This is what's confusing me as I evaluate options, and try to decide whether to wait for Ivy Bridge/Z77 vs a Sandy Bridge/Z68 combo now, with a possible Ivy Bridge CPU upgrade later.
Lol? How do GPU's run on older mobos with Sandy Bridge? Its really simple... It's backwards compatible, but if you don't have 3.0 PCIE slot for the GPU.
GTX 680 Doesn't nail out the full potential of the card on 2.0 or 2.1... But if you had a PCI 3.0 Slot it will gain full bandwidth again.
Don't worry about PCIe 3.0 vs 2.0. Even the GTX 680 can't utilize all of the bandwidth from a PCIe 2.0. If you want to get an I5-2500k then you won't be able to utilize PCIe 3.0 anyway. You would have to wait and buy a Ivy Bridge chip.