Quick Answer

A quality 1000W PSU in Fourways costs roughly R2,800 to R5,500, with 80 Plus Gold ATX 3.0 units the ones to target. A 1000W supply is sized for an RTX 4080 or 4090 class build; for an RTX 4070 system, 750W to 850W is plenty and saves money. Match the wattage to your actual GPU and CPU draw rather than buying the biggest number simply because it is on the shelf. A 7 to 10 year warranty is the clearest signal of the build quality protecting your card.

Do You Actually Need 1000W?

A single high-end GPU plus a modern CPU rarely draws past 600W under real load, so 1000W is headroom for a 4080/4090 or future upgrades. ATX 3.0 units with a native 12VHPWR connector handle GPU power spikes cleanly, which matters on the highest-tier cards. If your card tops out at an RTX 4070 Ti, a good 850W unit is the smarter spend.

Efficiency, Cables And Warranty

80 Plus Gold means around 90% efficiency at typical load, running cooler and quieter than Bronze. Fully modular cabling keeps a Fourways build tidy and improves airflow. Look for a 7 to 10 year warranty, which signals component quality and protects an expensive GPU from a failing supply.

FAQ

Is ATX 3.0 worth it for a 1000W PSU?

Yes if you run a current high-end GPU, because the native 12VHPWR connector and better transient handling avoid adapter clutter and reduce the risk of shutdowns under power spikes.

Will a 1000W PSU waste power in a smaller build?

No, a PSU only draws what the system needs, so it will not waste electricity. The only downside is paying for capacity you may not use.

How long should a PSU last?

A Gold-rated unit with a 7 to 10 year warranty typically outlasts two GPU upgrades, so it is one of the few parts worth carrying forward into your next build.

TIP

Pro Tip

Add up your CPU and GPU rated power, then add about 30% headroom. That figure, not the biggest number on the shelf, is the wattage that keeps your system quiet and efficient.