Review Index:

Seasonic PRIME Ultra 750W Titanium Power Supply

Manufacturer: Seasonic

Introduction and Features


It’s been almost two years since we first looked at Seasonic’s top of the line PRIME 750W Titanium power supply. Since then Seasonic has tweaked the design, increased the warranty to 12-years, and added “Ultra” to the name. So what else has changed? Is the PRIME Ultra Titanium still one of the best power supplies money can buy?

View Full Size

Sea Sonic Electronics Co., Ltd has been designing and building PC power supplies since 1981 and they are one of the most highly respected manufacturers in the world. Not only do they market power supplies under their own Seasonic name but they are the OEM for numerous other big-name brands.

Seasonic’s PRIME Ultra lineup was introduced last year with the Titanium Ultra Series, which currently includes four models: 1000W, 850W, 750W, and 650W. Additional PRIME models with both Platinum and Gold efficiency certifications as well as a fanless model are also available.

All of the PRIME Ultra Titanium Series PSUs come with all modular cables and are certified to comply with the 80 Plus Titanium efficiency criteria; the highest available. The power supplies are designed to deliver extremely tight voltage regulation on the three primary rails (+3.3V, +5V and +12V) and they provide superior AC ripple and noise suppression. Add in an upgraded super-quiet 135mm cooling fan with a Fluid Dynamic Bearing and a 12-year warranty, and you have the formula for an outstanding PC power supply.

View Full Size

Seasonic PRIME Ultra Titanium Series PSU Key Features:

•    1000W, 850W, 750W or 650W continuous DC output
•    Ultra-high efficiency, 80 PLUS Titanium certified
•    Micro-Tolerance Load Regulation (MTLR)
•    Top-quality 135mm Fluid Dynamic Bearing fan
•    Premium Hybrid Fan Control (allows fanless operation at low power)
•    Superior AC ripple and noise suppression (under 20 mV)
•    Fully modular cabling design
•    Multi-GPU technologies supported
•    Gold-plated high-current terminals
•    Protections: OPP,OVP,UVP,SCP,OCP and OTP
•    12-Year Manufacturer’s warranty
•    MSRP $179.99 USD

Please continue reading our review of the PRIME Ultra 750W Titanium PSU!!!

View Full Size

Here is what Seasonic has to say about the PRIME power supply line: “The creation of the PRIME Series is a renewed testimony of Sea Sonic’s determination to push the limits of power supply design in every aspect. This elegant-looking, exclusive lineup of new products will include 80 Plus Titanium – in the range of 650W to 1000W, and Platinum-Gold-rated units in the range of 850W to 1200W, with excellent electrical characteristics, top-level components and fully modular cabling.

Seasonic employs the most efficient manufacturing methods, uses the best materials and works with most reliable suppliers to produce reliable products. The PRIME Series layout, revolutionary manufacturing solutions and solid design attest to the highest level of ingenuity of Seasonics’s engineers and product developers. Demonstrating confidence in its power supplies, Seasonic stands out in the industry by offering PRIME Series a generous 12-year manufacturer’s warranty period.

The PRIME Ultra Titanium Series is Seasonic’s flagship line of power supplies that was developed on the foundations of more than forty years of Seasonic engineering knowledge. Its ultra-high efficiency and outstanding performance are the fine results of Seasonic’s continuous commitment to innovation and advancement. Improved low-load efficiency, highly suppressed ripple noise and a generous 12-year manufacturer’s warranty are just some of the characteristics that set this series apart from other power supplies on the market.”

Review Terms and Disclosure
All Information as of the Date of Publication
How product was obtained: The product is on loan from Seasonic for the purpose of this review.
What happens to the product after review: The product remains the property of Seasonic but is on extended loan for future testing and product comparisons.
Company involvement: Seasonic had no control over the content of the review and was not consulted prior to publication.
PC Perspective Compensation: Neither PC Perspective nor any of its staff were paid or compensated in any way by Seaonic for this review.
Advertising Disclosure: Seasonic has purchased advertising at PC Perspective during the past twelve months.
Affiliate links: This article contains affiliate links to online retailers. PC Perspective may receive compensation for purchases through those links.
Consulting Disclosure: Seasonic is not a current client of Shrout Research.

Video News

July 2, 2018 | 11:50 AM - Posted by LauRoman

I just wonder how are you going to clean, while still keeping it under warranty, something that has a 12 year warranty.

July 2, 2018 | 03:50 PM - Posted by Tantor (not verified)

I have an original Prime 650 (not Ultra) and would like to know specifically how they differ.

It would seem the Ultra is just a Prime, with a couple of meaningless upgrades. Is this true?

July 3, 2018 | 04:25 PM - Posted by Lee Garbutt

Yes, as we said above, the Ultra is an upgraded PRIME. Along with some minor tweaks to the design (Seasonic does not specify exactly what) the main difference is the longer 12-year warranty - I wouldn't call that meaningless. If you have an original PRIME you should be well served for many years to come.

July 4, 2018 | 12:35 PM - Posted by Jabbadap

They did specify it, when they released upgraded Ultra line. See:

July 9, 2018 | 03:18 AM - Posted by Dark_wizzie

Are the PSUs really that quiet? Basically not audible, quieter than the room? My computer's fan go at 450RPM and I have no HDDs to make spinning noises anymore.

July 13, 2018 | 10:34 AM - Posted by Lee Garbutt

Yes, they are very quiet. But sound/noise is subjective. Even though the SPL numbers are hard data different people respond differently to sound. To my ears, this PSU was very quiet - silent until the fan kicked in (no coil whine or electro-mechanical noise). The test lab is relatively cool and quiet (fairly constant 73 deg and 27 dBA) - to the point I opt to turn off the building A/C air handler during testing. Both the background temp and sound level will contribute to your experience of how loud a system is. Hope that helps answer your question.

Post new comment

The content of this field is kept private and will not be shown publicly.
  • Lines and paragraphs break automatically.
  • Allowed HTML tags: <a> <em> <strong> <cite> <code> <ul> <ol> <li> <dl> <dt> <dd> <blockquote><p><br>
  • Web page addresses and e-mail addresses turn into links automatically.

More information about formatting options

This question is for testing whether you are a human visitor and to prevent automated spam submissions.