Seasonic Focus GX-1000 V4 (2024) ATX 3 Review

Seasonic power supplies in recent years always seem to ship with Hong Hua fans and this one is no different. They are using a high grade HA13525H12F-Z fluid dynamic bearing fan rated at 2000 rpm, 0.50A, 12VDC. We have seen this fan way back in 2018 and it even featured in Antec units with Seasonic as the OEM (HCG Extreme Series 1000W).

You can buy these fans directly from Asia for around $25, so it's a relatively expensive unit. We have even seen them listed on Ebay lately (HERE). The fan is rated to a 100,000 hours mean time before failure @ 25C.

Seasonic have a small plastic strip running along the right side in the image above – this is a technique used to specifically direct air flow over the most sensitive components underneath.

Seasonic do not rely on a third party OEM for their designs – they design in-house. They have made many power supplies for companies such as Antec, Phanteks and ASUS.

The primary stage of this power supply adopts a single 105C rated Japanese capacitor from Nippon Chemi Con, a brand we see in Seasonic power supplies all the time. This primary capacitor is rated 400v 820uF. The last generation Focus GX-1000 that we reviewed back in September 2023 used two capacitors from Nippon Chemi Con, at 560uF and 330uF respectively for the same total output of 890uF. The secondary stage also features high grade Japanese capacitors. This unit offers OPP, OVP, UVP, OCP, OTP and SCP protections. As mentioned earlier there is a 10 year warranty with this power supply. This is only 2 less than the higher cost PRIME and VERTEX units in the range.

Seasonic have altered the design of this power supply, implementing surface mount technology on a new PCB layout. This helps to increase the internal space within the PSU, helping to enhance airflow and cooling performance.

The MOSFET daughter board is placed near the casing to improve heat transfer to the chassis itself.

Seasonic sent us a diagram of a Heat Transfer Coefficient which explains that the thermal conductivity of any given material is a measure of its ability to conduct heat. This is commonly denoted by ‘k' and is measured in W/m.K (Watts/meter-kelvin). Therefore the higher the value of k, the greater the materials ability to conduct heat.

We reviewed the previous generation of the Focus GX-1000 more than a year ago (HERE). If you want to compare internal shots and see the new design for yourself, our last review has a breakdown page over HERE. The platform density has changed from 36030mm³ to 17383 mm³.

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