Kingwin Stryker STR500 Power Supply Review

The Kingwin Stryker 500W Power Supply is a mid-powered computer PSU built specifically for those enthusiasts looking for quality power. The big feature here is that this unit is fanless, that means zero moving parts. If you are looking for silent in the 500 watt and up range, this is a good start.

continued...

Build Quality

As we already know the Kingwin Stryker 500W features a fanless design. Normally, quiet power supplies utilize 120mm or larger overhead fans which have come to be the preferred standard for quiet cooling environments, which Seasonic has been the longtime leader in, due to the ability to move a larger volume of air at slower speeds than a smaller diameter fan. However, the Stryker 500W eschews a fan altogether for the ultimate in quiet cooling form factor. While this is great for quiet computing environments, the key criteria in our evaluation is whether or not the cooling solution is sufficient, not necessary it’s sound level or form factor.

External Build Quality

Article Image Article Image Article Image

Article Image

Externally, the Kingwin Stryker 500W is both very similar to and very different from the LZP-550. The most similar features of the two units are the high quality, durable, black finish and the cabling/modular interface with the universal mini-fit JR style Crystal Cube plastic connectors. This unit differs significantly though in almost all other aspects as the unit is fanless and there are a great deal of changes to the housing because of that. Instead of having a large 140mm overhead fan, the Stryker has a heatsink which is ridged over a solid slab that has a pair of large holes in it. The sides of the unit ditch the, kind of cheesy, Lazer sticker and instead are honeycombed much like we saw with our last fanless unit the Seasonic X-400FL. Overall, the exterior of this unit looks a bit more refined given it lacks the Lazer sticker, but it now completely lacks branding. Some people may like that, but from a branding perspective it may be not the best idea for Kingwin and surely someone in the marketing department could design up a tasteful way to brand this unit. Maybe a nice print of the Kingwin logo on the top or the sides without using a really cheap looking sticker?

Article Image Article Image

The Kingwin STR-500 itself is ~6 3/4 inches long while the fixed and the modular cables provide a serviceable length of ~21 inches to 24 inches for the first connector on each string. The sleeving is a mix of complete wire loom that is well secured and the flat FlexForce style modular cables.

Internal Build Quality

Article Image Article Image Article Image

Article Image

Once we open the Kingwin Stryker 500W, we see that we are looking at almost the exact same power supply from SuperFlower that we saw when we reviewed the LZP-550. The general layout for this unit is very similar but there are a number of changes necessary to facilitate the unit’s fanless nature. Most obvious among the changes are the heatsinks. Gone are the thinish gold painted heatsinks of the LZP-550 and in are some new black heastinks. These heatsinks are larger and formed in to "T’s" which have thermal interface pads on the top which connect them to the heatsink that is the top of the power supply housing. We also gain a new heatsink on the DC-DC VRM that was not there previously. Overall, the integration is exactly the same quality as we saw from the LZP-550.

Article Image Article Image

Just as we saw with the LZP-550, the input filtering starts on the PCB itself and as we move around to the primary side proper we find the same LLC resonant design from SuperFlower. As we look under the much enlarged primary heatsink (which houses the APFC power components, bridge rectifier, etc) we see that the main capacitor is provided by Nippon Chemi-con and is rated at 400v 560uF 105C. There also is a relay and the APFC coil tucked under, the now expanded, heatsink along with a number of Y and X capacitors that are part of the input filtering.

Article Image Article Image Article Image

Article Image

Moving over to the secondary side, we again see a modern synchronous rectification scheme that utilizes an add-in PCB with solid capacitors for the DC-DC VRM’s. However, this layout is harder to see now that a heatsink has been attached to the VRM to help cool it in the new fanless layout. On the secondary, there are large number of solid capacitors and a number of standard capacitors all provided by Nippon Chemi-con. These capacitors are found throughout the wiring which emanates from the PCB, which happens to be labeled for five 12v rails, and is bundled with zip ties with the fixed wiring exiting the housing through the wire guard. The wires that lead to the modular interface are also well tended. The modular interface is again well constructed with a few small Nippon Chemi-con capacitors on the front of the modular interface.

Build Quality Summary

For all practical purposes, the build quality of the Stryker 500W is identical to the LZP-550. The actual features of the unit vary somewhat (ok a lot) as this unit is fanless. The finish is the same as before (excellent), the cables are once more well constructed, and the modular interface features the same universal connections as before. The exterior has some significant changes as the unit is fanless and the top of the unit is now a heatsink instead of being home to a large fan. Additionally, the unit is almost completely "debadged" and, while this is very clean, it probably could use to have some sort of Kingwin identifying touches added to help brand the unit a bit. Moving to the interior, the base unit is still what we saw from the LZP-550 including the very good components (including Nippon Chemi-con capacitors) and integration but there are a number of changes made for the unit to be fanless. This includes beefed up heatsinks, an extra heatsink on the DC-DC VRM and thermal interface pads on a number of heatsinks so that they will attach to the top of the housing. Given that this Kingwin unit features excellent build quality, like what we saw from the LZP-550, we have high hopes for this unit and can’t wait to put this unit through its paces.