Heatsink compatibility for the new Intel Skylake processors (LGA1151)

LGA115x heatsinks are compatible.

From source 3:

Noctua's info sheet for their new NH-D15S cooler, stating it's compatible with LGA 1151 (Skylake), and the installation manual, which shows using the same design of rigid, nonadjustable backplate with fixed posts as for the current 1150/5/6, with no special instructions for 1151, so the mobo holes and socket height must match. I'd been assuming the mount would be unchanged for Skylake, but it's nice to see for sure.

Sources: 1, 2, 3

Skylake Processors use the same mounting specifications as older LGA115X heatsinks. In other words, heatsinks that work with LGA 1150, 1155, and 1156 will work with Skylake.

Below is an example of one such heatsink.