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⇱ FEX 2604 Released With Better Memory Savings For Running x86_64 Apps/Games On ARM64 - Phoronix


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FEX 2604 Released With Better Memory Savings For Running x86_64 Apps/Games On ARM64

Written by Michael Larabel in Linux Gaming on 9 April 2026 at 08:19 PM EDT. 14 Comments
Out today is the newest monthly update to FEX for this emulator for running Linux x86/x86_64 binaries on AArch64 (ARM64) Linux systems, including games and the likes of Steam Play with Windows games. This Valve-sponsored project that is quite important for the upcoming Steam Frame has rolled out more performance improvements, memory savings, and other improvements with FEX 2604.

Memory savings improvements landed for FEX 2604 that are particularly beneficial for systems with just 8GB or 16GB of RAM, which is good news considering the ongoing RAM pricing these days. Various improvements are making FEX more applicable on those ARM devices with just 16GB or less of memory.

FEX 2604 also brings a variety of performance improvements, including some optimizations to avoid jumping out of the JIT for an average of a 3.7x improvement for some operations. Games using x87 transcendentals particularly benefit like for Fallout: New Vegas.

👁 FEX-Emu usage for Steam


Plus there are bug fixes and other workarounds with today's FEX 2604 release. Those wishing to learn more about this important project for x86_64 software on ARM64 Linux can do so via FEX-Emu.com.

Michael Larabel is the principal author of Phoronix.com and founded the site in 2004 with a focus on enriching the Linux hardware experience. Michael has written more than 20,000 articles covering the state of Linux hardware support, Linux performance, graphics drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and OpenBenchmarking.org automated benchmarking software. He can be followed via Twitter, LinkedIn, or contacted via MichaelLarabel.com.