If the PSU can't supply required power, the system may crash, reboot under load, or fail to start. In worst cases unstable voltages can damage components. Always choose a PSU with enough rated wattage plus headroom (20–30%).

Yes — using a higher wattage PSU is safe and common. It often runs more efficiently at moderate loads and provides upgrade headroom. Just ensure the PSU is good quality and has the connectors you need.

These tiers measure PSU efficiency at different loads. Gold and Platinum are more efficient (less power wasted as heat), which can mean lower electricity usage and improved stability. Choose Gold for a good balance of price and efficiency.

Check your GPU's power connector requirements (6-pin/8-pin). Confirm the PSU has the same connectors or use manufacturer-approved adapters. Also confirm physical fit (PSU length) and the case's clearance.

Longer warranties (3–10 years) indicate the brand stands behind reliability. Check what the warranty covers (component failure, manufacturer defects) and whether it requires registration or proof of purchase.

Modular PSUs allow you to connect only the cables you need, improving cable management and airflow. They are slightly more expensive but very helpful in compact builds or neat-looking setups.

Yes — higher efficiency reduces wasted power as heat. Over many years and with high usage, Gold/Platinum PSUs can slightly lower electricity bills and improve component longevity due to lower operating temperatures.

Check the new GPU's TDP and recommended PSU wattage. If the new GPU needs significantly more power or additional connectors, upgrade the PSU. Otherwise, a PSU with enough headroom may still be fine.