Windows is preparing for Intel's biggest x86 change in years, but only Xeon chips will use it at first
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Big Beautiful Registers: Three years after Intel first introduced the technology, x86 APX extensions are finally making their way into the Windows ecosystem. The new instruction set advancement will initially be limited to Xeon processors, but the performance gains could still be significant.
Windows enthusiast Xeno recently uncovered what could be one of the most interesting changes coming to future Windows releases. Microsoft's OS may soon offer an option to enable Advanced Performance Extensions (APX) support on compatible hardware, the self-described "Windows Insider since day one" said. In turn, APX could deliver a significant – although still largely unproven – performance boost for software optimized for x86-64.
Xeno spotted the change in Windows Insider build 29695, suggesting that it could eventually become part of the major "Rubidium" update expected in 2027 as Windows...
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