It is nice to see Antec's Signature PSU line coming back to life again. I still remember the legendary Signature 850 and 650 models, which were phenomenal products during their release 12 years ago. The new Signature line consists of three models with 1000W and 1300W capacities, and efficiency levels ranging from Platinum to Titanium in the 80 PLUS scale, with the Titanium model achieving an impressive ETA-A+ rating in the Cybenetics scale.
The overall performance of the Signature 1000 Titanium is impressive, although it doesn't manage to take the lead from the Corsair AX1000, which also uses the same Seasonic platform. When it comes to noise output, both PSUs have the same Cybenetics rating, LAMBA-A (20-25 dBA), which is impressive given the 1kW capacity.
The Antec Signature 1000 Titanium (ST1000) will soon be available in the US market with a pretty high price tag ($280). The Platinum 1300W model (SP1300) will be more affordable, at $270, and the Platinum 1000W unit (SP1000) will cost 230 dollars. The Seasonic Prime Titanium model with similar capacity costs ten dollars more than the ST1000, while the Corsair AX1000 has a similar price tag with Antec's high-end offering. Since all three models are based on the same Seasonic platform, their overall performance is identical, and they also feature silent operation, so the purchasing decision comes down to availability, current street price and brand preference.
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Disclaimer: Aris Mpitziopoulos is Tom's Hardware's PSU reviewer. He is also the Chief Testing Engineer of Cybenetics and developed the Cybenetics certification methodologies apart from his role on Tom's Hardware. Neither Tom's Hardware nor its parent company, Future PLC, are financially involved with Cybenetics. Aris does not perform the actual certifications for Cybenetics.