LGA115x - One Size Fits All
When Noctua announced availability of a new bracket our thoughts went back to the change from LGA775 to 1156. In the time since, we learned that LGA1150 for Haswell isn't much different than LGA1155. The only real change is to the processor Z-Height, Haswell is 0.04mm shorter, or roughly around the height of two hairs stacked on top of each other. The reduced height shouldn't affect most aftermarket CPU cooler installations at least those with spring pressure plates.
We're not sure if older Intel retail coolers for 1156 / 1155 will have an issue or not with the new z-height. We don't see any issues with making contact, but the shorter IHS will reduce pressure. Intel specs minimum pressure at 311 N [70 lbf] and maximum at 600 N [135 lbf]. Most of us don't have the equipment to measure ILM Static Compressive Load on the processor IHS, but it would make for a fun test in our heatsink reviews.
What this means is your Sandy Bridge and Ivy Bridge coolers should work fine with Haswell. Since this is a new product Haswell should have a more efficient IHS when compared to Ivy Bridge. Intel ran into a little issue with the processor core and the IHS. At one time it was reported the issue had to do with using thermal paste instead of soldering the core to the HIS, but later we learned a thermal paste had to be used because the core didn't make good contact with the metal top.
Hopefully Intel doesn't have the same problem when moving from Haswell to Broadwell, but we won't know for a couple years.
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