What "new hardware" are you worried about with this?
The board manufacturers build to specifications that allow for these "OC" modules to be used.
When you use them and set them to XMP specification, both the RAM voltage and IMC voltage are affected, but usually the IMC voltage doesn't need adjustment and can be left on "auto", or the small adjustments leave the IMC well within Intel's specification -- which provides an upper-limit guideline. Similarly, the RAM voltage itself is within Intel spec ranges. The only thing that changes in my sense of it is frequency.
Heat and voltage are the enemies of hardware, but I don't see how increases in frequencies are much of a risk. The configuration will either work -- or it won't work -- at frequencies higher than considered "stock."
Even six years ago, when I built the first of my Sandy Bridge "K" systems (second one still in my signature), we didn't bother with the DDR3-1333 specification, but bought 1600 or 1866 RAM.
A hardware specification is as much a matter of giving customers complete reliability as it is a matter of calculation to make warranty-returns small or non-existent, since a firm like Intel or Micron or Gigabyte must fold the expected cost into its financial plan. When you build a system to be overclocked, or choose RAM such as those available, "complete reliability" is your own business.
For instance, suppose Humpty-Trumpty builds a new tower. His architects and engineers must be sure of every dimension, every structural load, every stress point, or Humpty might have a great fall. They would use software and hardware to solve these problems, just as they would to plan the task-scheduling for minimum cost and time when they go from "breaking ground" to the champagne-bottle ceremony. If the processor propagates errors (as one Pentium-Pro model did once), Humpty will sue Intel. And that problem was actually the design of the processor -- not the speed and voltage at which it runs.
Likely, Humpty and the architects never did any "overclocking" or stress-tests. They don't care if it runs faster than Intel says it should. They may never even have done their own taxes, if they think they're "brilliant" for deducting carry-over losses that any retired owner of a rental property would know about for doing his own -- but that's P&N stuff.
We're different. Build a hotrod for the Fontana drag-strip or the Indie 500, it's not likely to be "street-legal." At least, if you can assure yourself that the processor functions accurately under your overclock applications, you're still "street-legal."
I don't think Intel considers the processor "out of warranty" if you run it at stock speed and voltage with RAM at higher than Intel "CPU" spec speed. You're certainly covered by the board and RAM manufacturers. You haven't lost your 3-year warranty with Intel. You can run the processor at stock spec, with the motherboard and especially the RAM at manufacturer's "stock" XMP spec, even if it is an "OC" beyond the Intel base specification.
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