TechPowerUp found photos of a production sample of Gigabyte's G1.Sniper 2 motherboard with PCI Express 3.0.
Previous photos of prototypes showed PCI Express 2.0 slots.
For a LGA1155 motherboard to have Gen. 3 PEG slots, it requires Gen. 3 specifications compliant switching circuitry, which wasn't available to motherboard vendors when they were designing their first LGA1155 boards. With availability of those components, motherboard vendors are not wasting any time in rolling out new variants of their LGA1155 boards that feature Gen. 3 PCI-Express slots. Gigabyte placed "PCI-Express 3.0" marking on the board manually using stickers, going on to show that adding Gen. 3 slots indeed may have been a last-minute decision at Gigabyte. The other interesting marking on the G1.Sniper 2 carton is the mention of the board being ready for upcoming 22 nm "Ivy Bridge" Core processors.