Rosewill Capstone-G1200 PSU Review

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Pros, Cons And Final Verdict

At a glance, you might wonder why the Capstone-G1200 is worth considering when the Photon-1200 costs $10 less and features full modular cabling. Although the Photon-1200 achieves tighter load regulation on all rails and higher overall efficiency, it has a major flaw: its ripple suppression is particularly bad, especially at high operating temperatures. For this reason alone the Photon-1200 trails Rosewill's Capstone-G1200 in our performance rating chart. On top of that, the Photon generates more noise than the already-loud Capstone-G1200. If we had to choose between both products, we'd pick the Capstone without a second thought.

However, if we weren't restricted to Rosewill's line-up, the high-capacity Capstone probably wouldn't be on our short list. It's an average performer, mostly because it's based on a topology that cannot match more modern designs in efficiency and ripple suppression. To make things worse, Rosewill implements a restrictive fan grille that doesn't facilitate good airflow inside the chassis. That fact, combined with the platform's increased heat dissipation, leads to high operating temperatures once the PSU is pushed. The only way to remove excess heat is spinning the fan faster, contributing to the noise issue. Of course, you can't expect a 1.2kW PSU to be silent, but with the proper design, noise can at least be minimized.

The platform might not be top-notch in terms of design or performance, but it does survive our toughest benchmarks. And we believe it's reliable enough. Otherwise, Rosewill wouldn't guarantee its longevity for five years. The older Capstone PSUs, which were made by Super Flower, used a better platform though. We're forced to wonder why Rosewill deviated from its winning formula. If Super Flower couldn't provide the same platform, why not choose another of the company's designs? Enhance Electronics might be a good OEM, but its high-capacity offerings don't stand up to Super Flower's Leadex platforms.

We are understandably displeased when we encounter a new product that cannot beat its predecessor, and that's what happens here. The older Capstone lines offered good performance along with affordable prices, and helped Rosewill establish its name in this challenging market. On the other hand, the new Capstones offer lower performance and cost about the same. So what's Rosewill's strategy here? If it wants to keep up with its competition, it needs competitive platforms at affordable prices. Even if the company couldn't keep its relationship with Super Flower going for the new Capstones, it should have found a better-performing alternative rather than an inferior platform unable to match other options out there.

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Aris Mpitziopoulos is a Contributing Editor for Tom's Hardware, covering Power Supplies.

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Contributing Editor

Aris Mpitziopoulos is a Contributing Editor at Tom's Hardware US, covering PSUs.

  • Giannis Karagiannis
    Quite low price for a 1200W unit but considering everything else I dont think its a good buy. Try better next time Rosewill...
  • Dark Lord of Tech
    Rosewill does have some Capstones that are great quality , The Super Flower models.
  • Dark Lord of Tech
    Also Enhance released a lot of nice V and VS series models for Cooler Master.
  • Aris_Mp
    Those older Capstones are EOL because they were older platforms which most likely aren't produced any more and on top of that Super Flower lately cannot meet demand, as the rumors say.
  • Dark Lord of Tech
    Super Flower is still pushing out a lot of units , I own 5 of he EVGA Super Flowers.

    The olser Capstones are solid , they are EOL , but were very good.
  • damric
    RIP Golden Green. You will be missed.
  • DSzymborski
    Really disappointing to see Rosewill slide back - those older Capstones made by Super Flower were really quite nice and you could frequently get excellent deals on them and I made a couple of builds for people with the semi-modular gold 750s. Too bad.
  • MasterMace
    It's too bad, the previous Capstones were so nice. This makes me wonder if they should have slapped a lower rating on this unit, instead of overshooting for a Gold 1200
  • firefoxx04
    I wish manufacturers didn't bother making crap power supplies for enthusiasts markets. The fact that they even sell is a huge problem.
  • Slobodan-888
    LOL, ripple is fine. It is within ATX specifications which states that is is allowed up to 120 mVpp RMS on 12 V rail.