What it means
Internal cables need enough slack without touching moving fan blades or being pinched by panels. Sharp bends or tension near connectors can cause poor contact. Use the case routing provisions and keep labels or connection records for maintenance. Modular power-supply cables are not universally interchangeable: an identical device-end plug does not establish compatible wiring at the PSU end.
How this affects everyday use
Rushed upgrades, crowded cases, unsuitable lengths and overtightened ties can obstruct access or strain connections.
A practical example
A closed side panel pushes a cable into a fan, producing a scraping sound only after assembly.
What to check
- With power disconnected, inspect fan clearance and panel pressure points.
- Check connector seating and manufacturer guidance for cable bends.
- Confirm each modular cable is approved for the exact PSU model.
Practical next steps
- Reroute cables through suitable channels and secure them gently.
- Replace damaged or incompatible cables with approved parts.
- Recheck fan clearance and connector seating before closing and powering the case.
Keeping it reliable
Plan routing before fitting bulky components. Never force the panel shut or mix modular cables merely because plugs fit. Recheck routing after every hardware change.