Strong Showing: High-Performance Power Supply Units

Cables And Connectors

The EPS connector (same pin configuration as the ATX connector) provides 24 pins, a connection to ATX boards with 20 pins is only possible via an adapter. Take care with the 6-pin connector! The coding of the pins may be the same as on the PCIe connector, but the lead configuration is completely different. Getting this mixed up can have serious consequences and in the worst case, the graphics card could be damaged.

Besides the four-pin P4 connector, there is also an eight-pin variant for the operation of dual Xeon boards. Eight 5.25" connectors and two floppy connectors should meet all requirements, but no SATA connectors are supplied.


The power supply had no problems on our test bed. The device reaches 600W no problem, and all voltages are fully within the specifications, even at this maximum output.

The name plate could be a little clearer, but all the specifications are on it

What is particularly impressive is the efficiency of this unit. The efficiency under medium load is 80.3%, the best in this test! Under maximum load it is at 78% and under minimum load 75%, so this power supply rakes in the points here, too. Even in stand-by mode it doesn't do too badly - at 46% and 67%, the efficiency is relatively good.

A power supply with a good efficiency level can save real money on the electric bill, especially with workstation systems using several CPUs that often run constantly. Given this, the PSM-6600P from Zippy may be a very good investment. However, at $185, the unit burns a pretty big hole in your pocket, which is the downside of its high efficiency.