MemTest86 vs Notebook FanControl

MemTest86 is a bootable utility that checks computer RAM for faults using memory test algorithms and patterns. It runs from a USB drive without an installed operating system, although Windows, Linux, or an Intel-based Mac can be used to create that drive. Version 11.7 requires UEFI firmware and x86 or ARM64 hardware, and does not support Apple Silicon M-series Macs. Its listed coverage includes 14 algorithms, such as SIMD, Row Hammer, and DMA tests, and support for DDR2, DDR3, LPDDR4, LPDDR5(x), ECC, CDIMM, and CAMM2 memory. It can create customizable HTML reports and, on supported configurations, decode an error address to identify a failed DIMM or chip. The Free Edition supports up to 16 CPU cores; Pro supports up to 512 and adds automation and custom tests. Site Edition adds PXE-based LAN deployment and Management Console integration. The Free Edition costs nothing; Pro Download costs $116, paid once.

Notebook FanControl (NBFC) is a free, open-source service for controlling notebook fans on Windows and Linux. Its configuration system adapts the service to many notebook models. Windows users run an installer, choose a notebook configuration, and apply it so NBFC can control the fans. Linux users build the software themselves, install its systemd service, and apply a notebook configuration; the project provides no pre-built Linux releases. Downloads are linked through GitHub releases and a Chocolatey package. The repository includes the GNU General Public License version 3. An FAQ points to a supported-notebook list and says a configuration for a similar model may work when yours is absent. The maintainer does not create individual configurations, so users may need to make one themselves. Some systems have conflicts with ImDisk Toolkit or HWiNFO. Nvidia Optimus notebooks may lose fan control while the dedicated GPU is active, and Linux Secure Boot can require disabling.