Master Chief awaits you on the Xbox One S’ disc drive mount. (credit: iFixit)

Ars’ review of the latest Xbox hardware revision, the Xbox One S, took a long look at the console’s updated exterior (along with its 4K- and HDR-related upgrades). To get to know its guts, however, we turn to the teardown experts at iFixit, who went on a warranty-voiding dive on Wednesday to find out how Microsoft shrank the system a full 42 percent.

In doing so, the site’s teardown team confirmed the myriad parts making up the full system, and as expected, we’re getting the kind of change in parts vendors and component sizes we expected from a three-years-later hardware revision. For starters, iFixit shows off the Xbox One S’ updated, shrunken power supply, which is now fanless, embedded in the system, and wedged nicely alongside the updated cooling rig—a custom-molded 120mm fan, an aluminum heat sink, and a copper heat pipe set.

The launch edition’s 2TB hard drive can also be seen, and in good news, its interface has been upgraded from SATA II to SATA III. Our testing didn’t reveal any particular drive-speed boosts as a result of this, which is probably because the included Seagate drive runs at 5400 RPM (with a 32MB cache), but we’ll be curious to see whether the system’s loading times are boosted when a solid state drive is hooked into that SATA III interface; if the Xbox One S’ SATA controller is rated for SATA III, the difference could be noticeable. Anybody who tests this, however, risks voiding Xbox’s hardware warranty.