Micronics Wizmax G 1200W ATX v3.1 PSU Review

Epilogue

Micronics’ partnership with the seasoned Chinese OEM Great Wall begins with the Wizmax G series, and the initial impressions are promising. Voltage regulation is tight enough at 12V and 5V, with good ripple suppression. The 12V rail maintains its voltage above the respective limits under a 200% load, as dictated by the ATX v3.1 standard. That said, the transient response is not competitive at 12V and requires improvement at 3.3V, as many similar capacity units perform better in these tests. On the other hand, the hold-up time is extended, the APFC converter delivers high PF readings under both voltage inputs I tried (115V and 230V), and the PSU’s noise output is kept low. Moreover, the 5VSB rail has decent efficiency, and vampire power at 115V is low.

This is a platform destined for Gold level; it barely meets the Cybenetics Platinum efficiency requirements, especially at 115V, so it isn’t competitive when compared with more competitive platforms. I also have to take into account the asking price, which is relatively high at $210, placing this product on the same playing field as more efficient platforms/PSUs. Moreover, GW needs to address the high inrush currents and also minimize vampire power at 230V to below 0.1W.

In the protection features section, which is among the most important, the OCP triggering points need to be tuned on the minor rails, as they are relatively high and close between hot and cold conditions. The same applies to the over power protection triggering points under normal and hot temperatures, which need to be further apart, although they are conservative. Moreover, it would be nice to see a fan failure protection feature implemented. Unfortunately, most PSU platforms don’t have fan failure protection, but it is time to help change that.

All in all, the Micronics Wizmax G 1200W is a decent-performing PSU, but it faces intense competition at its current price point.

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