Sign in with
Sign up | Sign in

Seasonic SSR-360GP: Measurements

Part 2: Four Cheap 80 PLUS Bronze Power Supplies, Reviewed
By

Efficiency According to the 80 PLUS Spec

Efficiency by Load

Proudly displaying the 80 PLUS Gold logo on its box, Seasonic's SSR-360GP has something that no other power supply in our two-part round-up offers, and we're eager to test it. The efficiency requirements are significantly higher for a Gold-certified PSU than the Bronze-rated ones. For all three load scenarios, the efficiency minimums to qualify for 80 PLUS Gold are five percentage points higher, in fact. And Seasonic's SSR-360GP satisfies those stringent requirements without a problem. At 20% and 50% of its maximum load, the supply complies with little leeway to spare, while its efficiency at full load is noticeably better than the Gold tier's requirement. Seasonic extends its 5% advantage over the other PSUs even into low-load conditions. At 25 W, its efficiency is an admirable 75%.

The scope picture again reveals spikes that seem to plague all of the lower-end PSUs in our round-up. If we take them into account, all of Seasonic's DC rails would violate the ATX spec. But because we're looking past them, the waveforms look OK, if not a little more jagged than we'd expect. The SSR-360GP passes all other tests without a problem. It is also barely audible. We measured 30.2 dB(A) at 40 W and 30.6 dB(A) at 200 W; you'd only hear that with an ear close to the power supply.

A Close Look at the PCB

Building an 80 PLUS Gold-rated PSU to sell at $60 is quite a challenge, even for a company like Seasonic, since the high-quality parts are more expensive. Thus, money has to be saved elsewhere. For instance, we notice that the SSR-360GP's soldering quality, while OK, does not approach what you'd find on the company's flagship X-series. However, the electrical design is still quite modern, utilizing a DC-DC converter and an LLC resonance converter. Almost all capacitors are made in Japan. We found capacitors from Hitachi, Chemi-Con, and Rubycon. A few capacitors are made by Korea-based Enesol. All necessary components are there, and the component layout looks nice.

React To This Article