Antec Signature 2200W PSU Review (2025)

1. Introduction2. Bundle & Cabling3. External4. Internal5. Testing Methodology and Results6. Closing Thoughts7. View All Pages

There is no doubt that this 2,200 Watt PSU is worthy of being called a ‘Signature' power supply. As the review has already detailed, this is a Seasonic OEM part and the quality of finish and power delivery is superb.

The quality of the construction on the outside is excellent – the power supply is massive (210mm long) and very heavy, being almost identical to the original Seasonic design the unit is based around. When we get a look inside, the unit ticks all the boxes we would expect. Three high grade Nippon Chemi Con 105C-rated capacitors handle the primary stage to deliver a combined, staggering 2,460uF. Other capacitors in the unit are from Nippon Chemi Con and Rubycon, so the quality remains consistent throughout. Soldering quality is high as well.

A high-grade Full Bridge LLC architecture with synchronous rectification and DC-DC topology ensure that power remains consistent and efficient across the full load range. We measured close to 95% peak efficiency which is exceptional and one of the best results we have seen in our labs.

The Signature 2200W incorporates a high grade Hong Hua fluid dynamic bearing fan that delivers great results. At most loads, it is barely audible, and only when load exceeds around 1,800 watts does the fan make its presence known. You wouldn't want to be running this unit at 2,200 watts for long as the fan is clearly having to work hard and noise becomes a little intrusive.

All in all, if you have £450 to spare then this PSU deserves some serious consideration. Most of us will never need this kind of power to be honest, but I guess if you have multiple RTX 5090s to power a plethora of monitors it would make a good foundation for a workstation-style system. Seasonic have claimed that this unit is primarily aimed at ‘engineering for AI computing, professional workloads, and next generation PC enthusiasts.'

As we publish this review, stock is said to arrive in the UK sometime in December. We have European and UK pricing of €519 and £449.99 respectively, but we can confirm this is accurate when etailers start listing stock.

I would highly recommend this unit if you have need of insane amounts of power delivery – with the 12-year warranty, you get plenty peace of mind for the future.

Pros:

• Titanium levels of efficiency. Flagship power delivery.
• Quality cabling.
• Built like a tank.
• Fully modular.
• Delivered a sustained 2,200 watts of power.
• 105C highly rated Japanese capacitors in both primary and secondary stages.
• Staggering 2,460uf output.

Cons:

• It's not cheap.
• It's physically large (210mm long).
• Ripple suppression could be better.

KitGuru says: The Antec Signature 2200W is an exceptional power supply. if you have a high-end PC with multiple graphics cards or are building a new workstation and need huge amounts of 12V Amps then this should be right at the top of your shortlist.

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