Asus Rog Strix 1200W Platinum ATX v3.1 PSU Review

Epilogue

The Asus Rog Strix 1200W Platinum uses a modern platform, GaN MODFETs, and quality parts. Still, something looks missing since its overall performance is among the lowest in the 1200W category. The performance difference with other popular products, e.g., the Seasonic PX-1200, is insignificant at only 1.1%, but I expected more from this platform and Great Wall. It seems that Asus only paid special attention to the PSU’s output noise, leaving out performance and other vital factors. However, the PSU meets the ATX v3.1 requirements in transient response; it isn’t fully compatible with this standard since its power ok signal’s hold-up time is the same as the hold-up time, while it should be at least 1 ms lower. To get an ATX v3.1 compliance pass a PSU must meet all corresponding requirements, and this is something that some manufacturers miss focusing on the power excursion requirements which after all are overkill for the current generation GPUs, since none of them has so high power spikes to ask for a 1200W PSU’s double max power.

The transient response of the 12V rail at high loads is not that good, and the same applies to the 3.3V rail, which needs to be beefed up. Moreover, the inrush currents are high, and vampire power should be lower. On the other hand, the unit’s efficiency is high, the 5VSB rail achieves sky-high efficiency, the load regulation is tight on the primary rails, ripple suppression is good, and the PFC converter performs well. According to my sources in Asus, you should expect a price similar to the Corsair HX1200i for this unit, which currently costs $280. This is a high price tag, and Asus should improve this PSU to justify it. The first and most crucial step is to either increase the hold-up time or lower the power ok signal’s hold-up time to achieve a delay that exceeds 1 ms and fully meets the ATX v3.1 specification.

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 product’s price. I get a commission from Amazon every time you do it, which can make a difference for me, especially now that I am on my own, working exclusively for my media and not for someone else.