Internal Design and Components

FSP uses a new design and no active clamp this time, but basically this PSU consists of some well known technologies. Two large main caps are more than enough for a 500W PSU and FSP has chosen two nice Panasonic devices; there are some Japanese caps on the secondary side as well. You can see the heatsinks for the VRMs (top right) and even larger ones for the Power Factor pre-regulator. The inlet filtering is extensive but there is no MOV. A PS223 offers the safety functions on the secondary side, including OCP. The voltage pulses of the resonant circuit run nearly sinusoidal and the transistors turn on at zero voltage. Together with the low resistance on the drain-source path the power dissipation is much lower during turn-on, turn-off, and the saturation of those transistors. The overall design definelty looks like a Seasonic X-460FL with different caps and no full line filtering stage on the AC plug.

External Impressions, Cables and Connectors Load Test Results
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  • Pappnaas - Friday, April 20, 2012 - link

    but i found no information included about the size of the unit. Would be nice, if the dates could be added.
  • ggathagan - Friday, April 20, 2012 - link

    From FSP's website:
    5.90” (W) x 5.51” (D) x 3.38” (H)

    5.51" is 139.95mm
  • ggathagan - Friday, April 20, 2012 - link

    My apologies, that was the fanned version.
    Looks like 160mm for this version

    Dimensions(L x W x H)mm: 160 x 150 x 86
  • sgtpokey - Friday, April 20, 2012 - link

    What are the dimensions of the PSU 150mm long, 160mm long, or what? This is actually important for those of us with actual experience running fanless pc builds (fot HTPC's).

    Many fanless enclosures have non-standard formats and may have space restirctions when choosing a fanless psu. In my case the "long" PSU of >160mm will not fit in my case, 160mm would work but leaves me no wiggle room and i would prefer a "standard" size of 150mm.
  • ggathagan - Friday, April 20, 2012 - link

    Call it 140mm
  • ggathagan - Friday, April 20, 2012 - link

    Or call me stupid and call it 160mm
  • KTGiang - Friday, April 20, 2012 - link

    My most recent computer component I bought was a fanless PSU. Specifically, it was a Kingwin STR-500 and I don't have a single regret on the purchase. I had no need for a new PSU but I wanted to change the PSU because the "silent" fan was still audible to my ears in a quiet setting. I love that manufacturers are creating more efficient and fanless power supplies for us consumers to choose

    The one positive side effect of having a single fan PC that I had not realized until recently was the fact that I had almost no dust in my tower after 5 months of heavy usage.

    As of right now, my current setup only has 1 Noctua 120mm fan mounted onto a massive Prolimatech cooler. It is on a fan controller that I only turn up when gaming. When idle, the 2 loudest things in my room are the HDD that I have in a removeable bay and the next loudest thing is the power current going through my monitor.

    Hints for making the quietest PC:
    What I found to be most useful in making a "silent" pc is a case that is well ventilated. The cases that are "silent" and are often laced with tons of "noise dampening foam" tend to hold in heat and don't go very well with fanless equipment. I had previously had the Hush from NZXT and I found that the PC ran about 5c warmer when the side panel was on. I am currently using the NZXT Vulcan which has never been touted as a "silent" case but I bought it and removed both of the included fans. Most of the case is covered in a mesh grill that allows for any heat to dissipate out. I had tried to go completely fanless but it wasn't practical when gaming. As my GTS450 is fanless, there would be absolutely no airflow. The solution was to add a single Noctua fan between the GPU and the CPU to have a "push" of air straight up and out of the case. The main OS is on a SSD to eliminate any vibration noise that may come from the HDD. The storage HDD is on a removeable HDD tray so it can be easily disabled when not needed.

    If anyone knows of a quieter fan that has quite a bit of CFM feel free to recommend it. I'd like to find a quieter option if they're available.
  • jwilliams4200 - Friday, April 20, 2012 - link

    I don't know of any fans that are significantly quieter than the Noctua.

    But I thought you might be interested in a HDD silencer that I have tried, the Smart Drive Neo. It is expensive, but it silences your HDD and keeps it cool. It mounts a 3.5" HDD in a 5.25" bay.
  • Iketh - Friday, April 20, 2012 - link


    Please ban this a$$hole.
  • JarredWalton - Friday, April 20, 2012 - link

    Done! Hint: putting in links (even redirected links) to a site that sells something will get your account banned, ScottKPickering.

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