MemTest86+ vs Universal x86 Tuning Utility

MemTest86+ is a free, open-source stand-alone memory tester for x86, x86-64, ARM AArch64, and LoongArch64 computers. It uses algorithms including moving inversions and Modulo-20 to detect memory failures and investigate crashes, freezes, or system instability. The tester can access almost all computer memory without operating-system memory or UEFI library restrictions. It can run from legacy or UEFI BIOS, through Linux boot protocols, or from a FAT32 USB flash drive, CD-ROM, or PXE network boot. For PXE, the project documents different binaries for BIOS and UEFI boot as iPXE or PXELINUX payloads. Testing continues indefinitely, with the pass counter advancing after all selected tests finish. The software is licensed under GNU GPL version 2, with no additional restrictions on private or commercial use. Stable and nightly binaries are available, though nightly builds are generated automatically and are untested and unsupported. Secure Boot must be temporarily disabled because the binary is not signed by Microsoft. USB drivers remain in progress, and not all USB devices are supported.

Universal x86 Tuning Utility (UXTU) is a free Windows utility for adjusting processor and GPU settings on x86 laptops and computers. It works best with Zen-based CPUs or APUs and Intel CPUs from the fourth generation onward. Users can select premade presets, save custom ones, or choose Adaptive Mode, which monitors processor temperatures as it adjusts power limits. The app also has Game Library, System Info, and Automations sections. AutoOC monitors CPU and memory instability signals and changes Curve Optimiser offsets for Zen-based CPUs and APUs. Version 26.3.0 added an in-game overlay, preset backup and import, tray shortcuts, Windows power-plan options, Intel presets, and experimental Zen6 support; games with anti-cheat may not always work with the overlay. Windows installer and portable downloads are available. The latest stable release requires .NET 10 64-bit, PawnIO Driver, and Microsoft Visual C++ Redistributable. UXTU is free under GPL-3.0. The project describes itself as a work in progress and warns that misuse may cause instability or malfunction.