The two coolers of the new i4 Series from Noctua are targeted at Intel Xeon processors, frequently seen in workstations and servers. The NH-U12DX and NH-U9DX are compatible with LGA2011, LGA1356, and LGA1366 sockets and are mounted with the SecuFirm2™ mounting system. NF-B9 PWM fans are included with each heatsink to provide quiet airflow over the fins. Noctua CEO Mag. Roland Mossig said, "we've decided to update our DX line of coolers to work with both Square ILM and Narrow ILM based LGA2011 platforms. At the same time, we've added PWM control and switched the U12 version to the new, slimmer layout of the NH-U12S, which not only provides better performance but also ensures easier access to the RAM slots, which was another long time request from our industry partners." The NH-U9DX will have an MSRP of $64.90 and the NH-U12DX will cost $74.90.