Create an account to save your builds and preferences, or continue browsing as a guest
Quick Answer
750W is tight for the RTX 4080 and i7-13700K. This combo draws approximately 450-520W under gaming load, with transient spikes pushing higher. An 850W PSU is the safer and recommended choice for this high-end pairing.
Running at 70% capacity is fine for steady loads, but GPU transient spikes can push total system draw to 600W+ for brief periods. A 750W PSU with poor transient handling may trip protection. ATX 3.0 750W units handle this better than older designs.
For a system costing $3000+ AUD, spending an extra $30-50 on an 850W PSU is sensible. You get comfortable headroom, better efficiency at load, quieter fan operation, and room for future upgrades.
If you have a quality 750W ATX 3.0 PSU from a top brand (Corsair, Seasonic, be quiet!), it will likely work. Monitor for random shutdowns during intense gaming - if they occur, the PSU is the likely culprit.
Our Verdict
750W works but is tight for the RTX 4080 + 13700K. We recommend 850W for reliable, worry-free operation. The extra cost is insignificant compared to the total build price.