The lga bracket included with the Kuhler 620 and 920 no longer supports LGA 775. If you require the LGA 775 bracket you can request it by starting a support ticket and providing a copy of your proof of purchase.
Pictures of the LGA 775
LGA 1150 has the same mounting hole locations as LGA 1155/1156. To install your Kuhler 620/920 on an LGA motherboard simply follow the directions that apply to LGA1155/1156.
Pictures of the 1150/55/56