Z87X OC SLI

[Useless]

Hello,
which slots do I have to use to run a 8/8 Lanes SLI?

[ex58]

Observe the steps in "1-5 Installing an Expansion Card" and install the CrossFire/SLI graphics cards in the
PCI Express x16 slots. (To set up a 2-Way configuration, please install the graphics cards in the PCIEX16 and
PCIEX8 slots. To set up a 3-Way CrossFire configuration, we recommend installing the graphics cards in the
PCIEX16 and PCIEX8, and PCIEX4_1 slots.)

Manual page19

[Useless]

Where can I find the manual online?

[ex58]

Manual:
http://download.gigabyte.eu/FileList/Manual/mb_manual_ga-z87x-oc_e.pdf

or more info here:
http://www.overclock.net/t/1396582/the-gigabyte-z87x-oc-review-with-4770k

[Useless]

So i can use the first and the third slot with 8/8 lanes?

[ex58]

Yes.