Articles: Cases/PSU

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Antec FP-150-8 Power Supply

The Antec ISK 310-150 computer case comes together with an Antec FP-150-8 power supply whose extraordinary shape we’ve mentioned above when describing the case itself.

Placed in the front part of the chassis, the PSU connects to the back-panel mains connector with an extension cable.

The broader end of the PSU contains an 80mm fan. Inside the chassis, this end is pressed against the side-panel vent hole.

The specifications are typical of compact PSUs. The total output power is 150 watts. 120 watts can be delivered via the +12V rail, which equals 80%. That’s not much by the standards of full-size desktop PSUs, but justifiable for low-wattage ones. Small computers need about as much power via the +3.3V and +5V rails as their full-size counterparts whereas the +12V load differs much more.

The Antec FP-150-8 PSU is equipped with the following cables and connectors:

  • One mainboard cable with a 20+4-pin connector (24 cm)
  • One CPU cable with a 4-pin connector (33 cm)
  • One cable with a PATA power connector (16 cm)
  • One cable with two SATA power connectors (15+10 cm; there’s also a 6cm cable with mSATA connector branching out from the first SATA connector)

The selection of connectors is almost ideal when it comes to expansion opportunities: the SATA connectors are for disk drives, the mSATA is for a slim optical drive (without any adapters), and the single PATA is for the Power button’s LED indicator (the case lacks a regular POWER_LED connector). And there are also standard mainboard and CPU power cables. The cables are just long enough for the Antec ISK 310-150 chassis.

Working together with our APC SmartUPS SC 620, the PSU could switch to the UPS’s batteries at its full specified load notwithstanding its active power factor correction.

The output voltages are very stable, none of them being more than 3% off the required level in the typical load range.

The +12V voltage can go outside the permissible range but only under an unrealistic combination of loads (near-maximum load on the +12V rail and minimum load on the other rails).

The output voltage ripple at the double mains frequency is low.

The high-frequency ripple is stronger, yet always within the norm.

The efficiency graph is indicative of active power factor correction. Running a little ahead, we can tell you that two PSUs covered in this review do not have this feature.

The efficiency isn’t high, though. It is only 78.3% at the maximum and varies from 77% to 78% in the typical load range. That’s the worst result among the four bundled PSUs (the others are more than 80% efficient).

The PSU isn’t quiet, either. Its 80mm fan rotates at 1800 RPM even at a load of 50 watts and accelerates linearly, reaching 2460 RPM at full load. Well, if your computer configuration needs considerably less power than the PSU’s maximum, the fan won’t be uncomfortable.

The standby source has a low load capacity of 1.5 amperes, but yields the required voltage without any problems.

Overall, the Antec FP-150-8 is good in terms of voltage stability and its cables are ideally suited to the computer case it is bundled with. However, its efficiency is downright low while its noise level is rather too high.

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