The ASUS ROG Strix 850W Gold F-MOD PSU is an 850-watt power supply unit (PSU) with an 80+ Gold certification, known for its premium cooling and customization options. It features ROG heatsinks, an Axial-tech fan with 0dB technology, and 100% Japanese capacitors. The PSU is fully modular, offering a clean build experience, and includes a 10-year warranty. It also features a magnetic logo and stickers for customization. The "F-MOD" likely refers to its fully modular design.