Interior and Topology

The internal structure of the ATX 2.3 PSU is dominated by two very big heatsinks. This is one reason the 80mm fan can be as silent as other PSUs with 120mm or larger fans. You just need the right topology and an efficient design. However, the heatsink on the secondary circuit is much smaller, as there are many components for filtering and regulation. The main capacitors are from Nippon Chemi-Con as well as on the secondary side with some additional all-solid caps from Sanyo on the VRMs.

Antec is using a well equipped EMI-filter with nice isolated x-capacitors and two PFC-chokes in this interleaved design. We can see two Infineon transistors for switching. They are absolutely famous these days because of their good transmission characteristics. Of course, there are interference-suppression chokes on each rail and a MOV behind the entrance. The safety-distance between the galvanic isolated circuits is more than enough.

Because of the numerous cables and big heatsink there is not much space on the secondary side. We will see if this presents a thermal problem under high load. Most of the wires have shrink tubing. The Silicon Touch IC offers SCP, OVP, UVP and OCP.

External Impressions, Cables and Connectors Voltage Regulation
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  • Alchemy69 - Wednesday, July 7, 2010 - link

    Very silent? Isn't that like a little bit pregnant?
  • computergeek485 - Wednesday, July 7, 2010 - link

    haha yea pretty much
  • shin0bi272 - Wednesday, July 7, 2010 - link

    My case has a dual power supply setup... Even running triple or quad SLI I wonder how long it would be before I would need 2 of these. he he he
  • JarredWalton - Thursday, July 8, 2010 - link

    Inexpensive Antec PSUs are the same as any other inexpensive PSU: they have to cut some corners. The high-end stuff is generally in a different league.
  • atmartens - Thursday, July 8, 2010 - link

    SPCR gives good power supply reviews. The CP-850 and CP-1000 in particular seem to be high quality. The catch is they only fit several Antec cases. In any case, don't just go by brand name.
  • michal1980 - Thursday, July 8, 2010 - link

    into a 20amp circuit. Or dont bother having anything else turned on in that room.

    1200watts, 110% load = 1320 Watts / 84.04% efficent = 1570.68Watts / 120V = 13 amps. Most outlets really only see ~115 volts. Which puts you at 13.65 amps.

    Most room circuits are wired at 15amps. Which means with this psu maxed out you have about 230 Watts left over for everything else.

  • HOOfan 1 - Thursday, July 8, 2010 - link

    Why would you be loading it to 110%?
  • michal1980 - Thursday, July 8, 2010 - link

    ok, at 100% your at nealry 12amps.

    Still darn close to the limit of most circuits at home

    Simple put, a 15amp circuit can put out 1800watts.
  • HOOfan 1 - Thursday, July 8, 2010 - link

    But why are you assuming that people would be running the PSU at 110%.

    That would be the fault of the owner, not the fault of Antec for building a 1200W PSU.

    A triple SLi GTX 480 setup would need about a 1200W PSU, although it wouldn't be pulling that much power.

    Not a good idea to even run a PSU at 100% for extended time.

    Besides, just put the PSU on its own 15A circuit.
  • Moricon - Friday, July 9, 2010 - link

    Ha,here in UK we have 240v Yay us :) 3000w at our disposal.

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