PSU wattage creep keeps happening as PC parts push higher peaks, quieter operation, and longer upgrade windows. For SA builders, the smart move is not maximum wattage, but a reliable unit matched to GPU, CPU, and cable needs.
PSU wattage recommendations keep climbing because modern GPUs pull huge transient spikes far above their rated draw. An RTX 5090 sits at 575W TGP but can spike well beyond that for milliseconds, and even mid-range cards now want generous headroom. As a rule, pair a 650W unit with an RTX 5060-class card, 850W with an RTX 5080, and 1000W or more with an RTX 5090. ATX 3.1 units (from around R1,200 at Evetech) are built to ride those spikes.
It is not that PCs use more average power; it is that GPUs now produce sharp, sub-millisecond current spikes. A card rated at 250W can momentarily demand far more, and an older PSU reads that spike as a fault and shuts down. The ATX 3.1 standard exists precisely to handle these excursions, which is why wattage advice has crept up alongside spec-sheet numbers.
Use these as safe SA buying anchors: RTX 5060 or RX 9060 XT pairs with a quality 650W unit; RTX 5070 or 5070 Ti with 750-850W; RTX 5080 with 850W; RTX 5090 with 1000-1200W. Always choose ATX 3.1 with a native 12V-2x6 connector for current-gen cards. A solid 650W ATX 3.1 unit starts around R1,200 at Evetech, with 850W around R2,000 and 1000W from roughly R3,500.
A little headroom keeps the PSU off its noisy, hot upper third and leaves room for a future GPU. Do not over-buy a 1200W unit for a 5060 rig, but do not run a 5080 on 650W either. Aim for the GPU to sit near 50-65% of the PSU's rating at full load.
Because they spike. A 250W card can momentarily demand far more for milliseconds, and an older PSU trips on that spike. ATX 3.1 units are designed to absorb these excursions without shutting down.
At least 1000W, ideally 1200W, and it must be ATX 3.1 with a 12V-2x6 connector. Suitable units start around R3,500 at Evetech. Anything under 850W risks transient-spike shutdowns.
Up to a point. Some headroom keeps the unit efficient and quiet and allows a future upgrade, but a 1200W unit on a 5060 is wasted money. Target the GPU at 50-65% of the rating.
PSU to your GPU tier: 650W for an RTX 5060, 850W for a 5080, 1000W+ for a 5090, and always ATX 3.1 with a 12V-2x6 connector for current-gen cards.
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