The LEPA B650 is a fair power supply, with efficiency between 82% and 87%, voltages within the allowed range, and noise and ripple levels below the maximum allowed. The only negative was the fact that it burned when we overloaded it, at 750 W.
Although not a flawless unit, the LEPA B650 is a good mainstream power supply, especially for its price (USD 80). One of its main competitors is the Rosewill HIVE 650 W, which costs USD 5 more. The model from LEPA presented higher maximum efficiency in our tests, while the model from Rosewill presented hi
gher minimum efficiency, better voltage regulation, lower noise and ripple levels, and it didn’t fail our overload test.
On one hand, if you want a better power supply, you will have to pay more. On the other hand, 650 W power supplies cheaper than USD 80 have lower efficiency and, in some cases, fake labeled wattages. The decision is yours.