Articles: Cases/PSU

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Circuit Design

Some details of the interior design betray the real maker of these PSUs. It is Andyson and it's not good news. Most Andyson-based PSUs we've tested in our labs have been rather inferior in quality.

The VP-550 (top) and the VP-650 (bottom) have the same interior design except for the differently shaped heatsinks. There are also some discrepancies concerning the ratings of certain components which are due to the difference in wattage.

These are obviously low-end PSUs as is indicated by their low component density. However, they do have active PFC, which is a rare thing to see in this price category. There is no dedicated voltage regulation. You can't expect to find it in a $50 PSU.

The 750W model is substantially different from its series mates in its PCB, layout and components.

Its functionality is the same, though. The only extra feature we can find is active PFC. Well, we must confess we know this interior design already. It is almost identical to that of the Hiper M600.

The only difference from the Hiper M600 seems to be the supervisor chip. It's a Weltrend 7510 instead of a PS223. The other two Value series products have the same chip, by the way.

There are electrolytic capacitors from WG and Teapo at the output of the lower-wattage models. Teapo components are high quality but WG capacitors do not have such a good reputation.

The 750W model is only equipped with Teapo capacitors.

Cables and Connectors

The VP-550 has the following cables and connectors:

  • One mainboard cable with a 20+4-pin connector (51 cm)
  • One CPU cable with a 4+4-pin connector (51 cm)
  • One graphics card cable with two 6+2-pin connectors (41+14 cm)
  • One cable with two PATA power connectors and a floppy-drive plug (42+15+15 cm)
  • Two cables with two SATA and one PATA power connector on each (42+15+15 cm)

The mainboard cable is sleeved whereas the others are just tied up with plastic straps. The VP-650 and VP-750 additionally have a third cable with two SATA and one PATA power connector.

The selection of connectors and the length of most cables are satisfactory for PSUs of that wattage. Perhaps the 550W model has too few SATA power connectors.

The only problem is that the CPU power cable is going to be too short to reach to a bottom PSU compartment unless you route it through the interior of your system case rather than behind the mainboard’s mounting plate.


The three models are identical in their specs except for the +12V rail. Besides the maximum +12V load (as is typical of Andyson platforms, it is not very high compared to the PSU's full output power – no higher than 80% with these Aerocool PSUs), the load capacity of each of the two virtual +12V output lines is different: 20, 22 and 25 amperes according to the particular model's wattage.

These Aerocool products have no 80 PLUS certification although Andyson's own PSUs based on the same platform as Aerocool's VP-750 sport 80 PLUS Bronze certification.

UPS Compatibility

Working together with our APC SmartUPS SC 620, the three PSUs were all stable at loads up to 335-345 watts when powered by the mains and could switch to the UPS's batteries at 310 watts.

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