Century II - 550W High-End
The Montech Century II - 550W High-End is a 550W ATX power supply rated 80+ Gold, fully modular. We do not hold a measured noise grade for this unit, so treat noise as unknown rather than as bad. Full specs, quality score and current prices are below.
Prices update regularly and may differ at the retailer. This page contains affiliate links.
Quality score
How we score →A power supply has no performance benchmark: every 550W unit delivers 550W. This scores how well built and how liveable the Century II - 550W High-End is, out of 100, from six published factors.
Better always scores higher, but the steps are uneven on purpose: Bronze to Gold is worth 11 of the 25 efficiency points, Gold to Titanium only 6. A factor we hold no value for scores zero rather than being skipped, so a unit we know little about never outranks a fully specified one. That does mean a zero can mean either poor or unknown, which is what the confidence figure above is for. Physical size scores nothing: ATX is a fit decision, not a quality one.
Other wattages in this range
The same Century II - High-End platform at a different rating. A larger unit runs a smaller load perfectly well, so buy for the card you plan to fit.
Specifications
Output & Rating
- Continuous power
- 550 W
- Efficiency
- 80+ Gold
- ATX 12V standard
- ATX 3.1
- Price per watt
- $0.127/W
Connectors
- CPU (EPS)
- —
- PCIe
- —
- 12V-2x6 / 12VHPWR
- —
- SATA
- —
Physical
- Form factor
- ATX
- Fan size
- 135 mm
- Modularity
- Fully modular
Electrical & Warranty
- Part number
- Century ll 550W
Compare the Century II - 550W High-End against every other unit on the power supply comparison table. Not sure how much wattage you need? The power supply guide works through the sizing.
Where to buy the Century II - 550W High-End
Every in-stock retailer offer we track, cheapest first.
| Retailer | Availability | Price | Buy |
|---|---|---|---|
| Amazon | In stock | $69.90 |  |
| Newegg | In stock | $69.90 |  |
The Century II - 550W High-End starts from $69.90 across 2 retailers, which works out at $0.127/W. Prices update daily from live stock.
What the Century II - 550W High-End can power
Compare all GPUs →The graphics cards this 550W unit meets the system requirement for, ranked fastest first at 1080p, with the margin left over. The resolution follows the wattage, because a unit this size is bought for a card that will be run at 1080p. Headroom is measured against the card maker’s own whole-system recommendation, so 0 W means it meets that recommendation exactly rather than falling short.
| Graphics card | Card draw | PSU advised | Headroom |
|---|---|---|---|
| Radeon RX 9060 XT 16 GB AMD | 160 W | 450 W | +100 W |
| Radeon RX 9060 XT 8 GB AMD | 150 W | 450 W | +100 W |
| GeForce RTX 4060 Ti 8GB Nvidia | 160 W | 550 W | +0 W |
| GeForce RTX 5060 Nvidia | 145 W | 550 W | +0 W |
| GeForce RTX 4060 Nvidia | 115 W | 550 W | +0 W |
| Radeon RX 7600 AMD | 165 W | 550 W | +0 W |
| GeForce RTX 5050 Nvidia | 130 W | 550 W | +0 W |
| Intel Arc B570 Intel | 150 W | 450 W | +100 W |
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