Segotep PM650W (SG-650P) PSU Review

Epilogue

The Segotep PM650W (SG-650P) uses a contemporary platform, and it would be way better with some changes. The fact that its EPS cable melted during testing is an easy fix. They need to install each of the EPS connectors on separate cables. Having both of them in the same cable is wrong, since these connectors can draw high amounts of power. This is a poor design choice, and even in low-capacity power supplies, it can be proven fatal.

The unit’s performance is not competitive, with loose load regulation, mediocre transient response at 3.3V, increased T3 timings that do not allow for Alternative Low Power Mode compliance, high inrush currents at 230V, low efficiency 5VSB rail, and low PF at 230V. On the other hand, ripple suppression is good, efficiency is generally high, and the unit’s EMI filter works well, which was a pleasant surprise to me, as manufacturers usually do not pay special attention to EMI emissions and filters at low-cost platforms. Lastly, the output noise is increased, but it is not too high. What left another (negative) impression was the bad tuning of the 230V fan speed profile.

Overall, Segotep PM650W (SG-650P) offers mediocre performance, and its dual EPS connectors on a single cable pose a threat, since the cable in my sample melted under high loads.

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