"PCI Express Configurations"

I am planning on buying an i5 3450 for my new pc but I noticed something that I don't understand on Intel's website...
It says in about the middle of the page "PCI Express Configurations : 1x16, 2x8, 1x8 & 2x4". Does that mean that if I use a graphics card on the x16 slot then the rest of the pci-e slots are useless because the cpu can't handle them? The mobo I going to buy is the Asrock H77 Pro4/MVP.


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More about express configurations
  1. The main PCIe controller is integrated into the CPU and has 16 lanes which are all mapped to the x16 slot on most boards. On SLI/CFX boards, those lanes may be either hard-wired for x8x8, x8x4x4 or have PCIe multiplexers to re-route 8 lanes from the x16 connector to the 2nd x16 connector to switch between x16, x8x8 and possibly x8x4x4 configurations.

    Most motherboards implement x16 / x8x8 using muxes instead of hard-wired.

    The other (non-x16) PCIe slots are connected to the IO Hub's PCIe 2.0 lanes. Since the IO Hub has only 8 lanes and at least one of them is usually taken by the GbE chip, the other PCIe slots are usually x4x1x1
  2. yes. ^ +1 to him. in other words, no, your other PCI slots aren't useless. you can sli or have any other PCI add ons as long as they are up to specs. that mobo has 1 16x PCIe 3.0 slot, meaning you can have 1 GPU because the other PCIe slot is 4x speed and 2.0, meaning its operating at a too of a slow speed to fully take advantage of another GPU, it would be a waste of money. but, you can pop other PCIe add ons into that as long as it can operate at PCIe 2.0 x4 speeds.
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