Choosing the right PSU wattage ensures stable operation under load and allows headroom for upgrades. This guide covers common wattage tiers and when to use each.
Wattage Guidelines
| Wattage | Typical Server | Configuration |
|---|---|---|
| 350-550W | 1U, 1-2 drives | Single CPU, no GPU |
| 750-800W | 1U-2U general purpose | 2 CPUs, 8-12 drives, 1G NIC |
| 1100-1400W | 2U fully loaded | 2 CPUs, 24 drives, 10G NIC |
| 1600-2400W | 4U/GPU servers | Max memory, multiple GPUs |
Efficiency Ratings
80 Plus certification levels: Bronze (82%) < Silver (85%) < Gold (87%) < Platinum (90%) < Titanium (94%). Enterprise servers typically use Platinum or Titanium.
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