Who wouldn’t want their Windows PC to run faster without spending money on new hardware? Well, Microsoft appears to be working on something that could improve performance and efficiency on future PCs. However, before you get too excited, there’s an important catch.
Windows Insider Xeno recently spotted a new setting, Advanced Performance Extensions (APX), in Windows 11 Insider Preview Build 29695. Microsoft is currently testing the feature in its experimental development channel, and it could eventually help compatible processors handle demanding tasks more efficiently. The setting lets Windows take advantage of Intel’s APX technology, but it requires a system restart after you enable it. While that might sound like another ordinary Windows toggle, what happens behind the scenes is much more interesting.
So, how exactly could this make your PC faster?
To understand why APX matters, we need to look at how processors handle information. CPUs use tiny, incredibly fast storage locations called registers to temporarily hold data while performing calculations. Having more of them means the processor can keep more information close at hand instead of constantly fetching it from memory. This is where Intel’s Advanced Performance Extensions come into play. First introduced in 2023, APX doubles the number of general-purpose registers available to 64-bit applications, increasing them from 16 to 32. That means compatible processors can spend less time moving data around and more time doing the work.
Intel’s own estimates suggest APX-optimized software could require around 10% fewer memory reads, over 20% fewer memory writes, and roughly 10% fewer instructions. These figures come from Intel’s technical analysis, not actual Windows gaming benchmarks. APX also includes instruction improvements that help processors avoid unnecessary operations, potentially improving efficiency in supported applications.
There’s a catch, and it’s a pretty big one
As promising as this sounds, there’s a good reason not to celebrate just yet. For starters, APX requires compatible processor hardware. Simply enabling the setting on an older PC won’t magically unlock the additional registers. Applications must also be built to use the technology before users see meaningful improvements.
Then there’s availability. Microsoft is experimenting with the feature in its Rubidium development branch, which could influence future Windows releases. However, the company hasn’t confirmed when, or even whether, APX support will reach the stable version of Windows 11. In fact, Microsoft explicitly warns that features appearing in its Experimental channel might never make it into a public release. Still, it’s an interesting development. We’ve become accustomed to Windows updates bringing new features and visual changes, but improvements that help future processors work more efficiently could ultimately be just as valuable.