SilverStone Hela 2500Rz ATX v3.1 PSU Review

Epilogue

If you are after a super-strong PSU, two are the main offerings in this category: the SilverStone Hela 2500Rz and the Super Flower Leadex 2800W. All other units I have evaluated so far have a maximum of 2200W. So, till the strong PSUs that I’ve seen at Computex 2025 are out on the market, you are confined to the two above choices. The Leadex model offers notably better performance, but it also costs around $400 more, making it 167% more expensive than SilverStone’s offering! This is a substantial amount, and given that the SilverStone unit can also deliver way more than its nominal power, things get more interesting. This can be an issue, though, since the Hela 2500Rz doesn’t know when to stop, delivering more than 287.20A in my OCP evaluation tests! Given the 11.894V level of the 12V rail at this point, it translates to 3416W, which is a tremendous amount of power for a desktop PSU! Assuming 85% efficiency at this power level, which is a generous assumption, the PSU draws from the AC socket 3928W, exceeding the 16A rating of its AC receptacle and the rating of the AC socket! This is why I expect SilverStone to properly tune the OCP at 12V. The over power protection also needs tuning under normal operating conditions. Moreover, such a high-end PSU should come with fan failure protection.

• Super Flower Leadex 2800W ATX v3.1 PSU Review

All in all, the SilverStone Hela 2500Rz is a decent-performing PSU. It might not have tight load regulation, but its ripple suppression is excellent, and the 12V rail’s transient response, which matters the most, is also good. High Power could do a better job, though, on the minor rails in general. The hold-up time is low because the platform utilizes low-capacity bulk capacitors to reduce production costs. The ATX v3.1 spec lowered the requirements for hold-up time, but I disagree with that, and in my opinion, it is a con when a PSU offers less than 17ms of hold-up time. Additionally, the conducted EMI emissions need to be adjusted, as I measured excessively high signals in the lower frequency range with both EMI detectors: average and peak. Lastly, this is a noisy beast, so if you’re looking for a silent operating PSU, don’t expect a high-capacity unit to also offer quiet operation.

Before investing in a new power supply, read my Best ATX v3.x PSUs article to check all alternative PSU offerings. You help me a lot by using my affiliate links, which don’t increase the price of the product. I receive a commission from Amazon every time you do it, which can make a significant difference for me, especially now that I am working independently, exclusively for my media, rather than for someone else.