Seasonic Prime ULTRA Platinum 850W Power Supply Review

1. Introduction2. Bundle & Cabling3. External4. Internal5. Methodology and Testing6. Closing Thoughts7. View All Pages

Our Seasonic Prime ULTRA Platinum sample shipped direct from Amazon in Europe. Seasonic are keen to point out that while other companies may indeed be shipping ‘golden samples' – they are confident enough to just get Amazon to ship retail products to reviewers.

First impressions are, as expected, positive. Seasonic finish their power supplies to a very high standard and the paint work is resistant to scratches. The bundle is extensive, and includes a raft of cable ties, along with a sticker and badge for a case.

Internally there are some changes over the earlier Non-‘Ultra' version of this unit. As detailed on our testing page earlier in the review, Seasonic have upgraded the primary stage capacitors which now means that in a pinch, this 850watt unit is actually capable of delivering over 1000 watts of power. 1030 watts in our particular case, before shutdown would occur.

Load regulation and noise suppression characteristics are also a little better than the previous iteration.

Ripple suppression and overall efficiency are both stellar, and technically the unit didn't exhibit any problems during our week long series of tests. Its a power supply that is clearly going to last a long time, across a handful of potential system upgrades and changes. The industry leading 12 year warranty would verify that Seasonic are standing confident behind their latest designs.

Getting UK pricing seems tricky right now but we see no reason why the pricing on this newer model would be more than the current price on the current non Ultra version – which is £189.95 on Overclockers UK HERE.

If I was being pedantic, I would ask Seasonic to increase the length of the CPU cables to allow system builders using the biggest chassis on the market a little more headroom. I would like to see less sleeved cables in future revisions, as the flatter cables are easier to route and hide in a new system build.

If you already own a Seasonic Prime Platinum 850W unit I see no reason to abandon your current model as it is a great power supply. For those in the market today looking for a killer 850 Watt high efficiency unit, then make sure you get the ULTRA version, even if you have to wait a few weeks for heightened availability in the UK.

Scan will be listing stock on this page for the new ULTRA range. Coming soon!

Pros:

• 12 year warranty.
• technically bulletproof.
• fully modular.
• 105 Japanese caps.
• excellent load regulation.

Cons:

• a few longer cables wouldn't hurt.

Kitguru says: The new Seasonic Prime Ultra Platinum 850W supply takes an already great design and with some minor tweaks, its been improved further. A fantastic purchase for an enthusiast user who wants the best power backed by an industry leading 12 year warranty.

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