It's actually the "faster Fast Ring," according to a July 2 blog post announcing yet another new Windows 10 test build.
Microsoft is making available to its Windows Insider testers on the Fast Ring yet another new Windows 10 test build.
Today's build, Build No. 10162, is the third preview build for Windows 10 for PCs that Microsoft has rolled out this week alone. Build 10162 follows by a couple of days Build 10159, which provided 300 new bug fixes, plus the new Windows 10 wallpaper, to the five million registered Windows Insiders. On Tuesday, Microsoft rolled out Build 10158.
What's new in today's build? There aren't any details in Microsoft's July 2 blog post, other than the claim that "our testing and internal telemetry metrics show it has better reliability, performance, battery life, and compatibility than any Windows 10 Insider Preview build so far."
If this new build passes muster, Microsoft is likely to make it available to Slow Ring testers, with ISOs, next week, officials said.