An 850W power supply is enough for most music-production PCs, but it may be far more capacity than the system needs. Audio workloads depend on the processor, memory, storage, interface and quiet cooling. PSU size should come from the full component list, especially any graphics card used for video or other creator work.
Design for noise and connectors
List the CPU, GPU, drives, expansion cards and cooling. Check required connectors, PSU form factor, cable length and case clearance. Never mix modular cables between models. A DAW system using modest graphics can need much less capacity than a combined music and 3D workstation.
The Corsair RM850e is a verified 850W reference at R1,900. The DeepCool PF750 is a verified 750W reference at R550. Wattage and price do not prove low noise, protection quality or suitability. Review current warranty, efficiency documentation, fan testing, electrical protections and connector set for the exact build.
Position the computer away from the microphone pickup direction and test a dense session plus export. Listen for fan changes and electrical noise through the complete audio path. Maintain approved backups of sessions and presets. Buy 850W when a documented component or near-term upgrade needs it; otherwise, choose a correctly sized supported unit and spend the difference on quiet cooling, storage or audio equipment.
Building a quiet music PC? > Ask Evetech to match verified power supplies to the complete studio parts list.