SilverStone FX500, 500W Flex-ATX 80 PLUS Gold power supply, SST-FX500-G

Product Information

Using google translate, it seems that the CAT-7760B is based on the Enhance 7660B architecture but with some modifications to "make it better". It looks like the CAT-7760B will perform great on 230V (80+ Platinium) & 110V (80+ Gold). Upgradable option for Noctua A4x20 directly from the company. Seems like a potential "endgame" SFF PSU. May still be not enough for a 3090. It's a field that SilverStone has become so entrenched in that although other companies produce compact PCs and related peripherals as well, none of them are really trying to be SilverStone's peer. As a result, SilverStone is one of the very few companies with a true variety of small form factor power and cooling solutions, rather than just a token device or two. Even with relatively standard, ATX-compliant equipment, SilverStone’s power products tend to have great power-per-volume ratios. Also, it was brought to my attention in another thread that the platinum does not have a -12v rail, but I don't know what that means, or how it will negatively affect my build. Can someone explain the differences between these two PSU's and help me decide which one to go with? Thanks to its super compact dimensions and 350W output, this unit achieves a pretty high power density score, reaching 707 Watts per liter. Moreover, it is able to deliver full load continuously (24/7) at up to 40 ℃ operating temperatures, while it is 80 PLUS Gold certified. There is no Cybenetics certification, though, so we don't have any data on its noise output. Given the PSU's compact dimension and the small, 40mm fan, we don't have high hopes for silent operation. SilverStone mentions a 20 dB(A) figure, but this only represents the PSU's minimum noise output, and there is nothing about maximum operating noise. When you see brands avoiding to provide a fan speed or a fan noise/speed graph, then surely there is something going on.

CAT-7760B components, noise levels & fixed coil whine issue, 2080 Furmark 1h test. ( https://www.bilibili.com/video/BV1oZ4y1V73m) EDIT Updates 20/12/2020: Been using it for 1 week. No problems so far. Really quiet no audible coil whine and low fan noise. It runs cool with my Ryzen 1800X + 1060 during my long gaming sessions, my previous Delta 400W PSU made the bottom of my case really warm. Huge improvement and pleased with the performance so far. Though they offer Noctua fans which I heard in another reddit post that it didn't had the proper air flow.

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EDIT Updates 08/02/2022: Working as per normal, for those who are asking. Have been daily driving the CAT-7760B with my 1800X+1060 combo in my 5L< computer. https://www.reddit.com/r/sffpc/comments/kb9nw3/absolutely_gorgeous/ What I have in mind is to duct a 120 mm (i.e. large diameter, low max RPM) centrifugal blower, mounted next to (rather than on top) of the PSU. This (I hope) would allow me to keep the build within the 40 mm height, while reducing the noise. The geometry of a centrifugal blower (i.e. small diam output) seems adapted well for coupling into the (small-diam) 40 mm input of the original 1U PSU fan. I need to make sure that the PSU controls the new beefier fan as if it was its native one (high RPMs based on load, shut-off if the fan fails etc).

SilverStone supplies the FX500 PSU in a simple cardboard box that is half the size of boxes designed for ATX products. The artwork on the box is simplistic, with a plain blue/white color theme and a picture of the PSU itself on the front side of the box. Inside the box, the PSU is merely wrapped in a bubble bag, with SilverStone betting that its small proportions and low weight are enough to prevent damage during transport. If you choose not to go with the 7660b, you will almost certainly be looking into performing a fan mod on whatever power supply you choose, because nearly every other power supply in the Flex ATX form factor comes with an extremely loud server-grade fan pre-installed. They are LOUD fans, and trust me when I say that this mod is an unavoidable part of building in a case this small unless you go with the 7660b. Inside the box, we found only the basics that come with any retail PC PSU. Altogether, the PSU comes with four mounting screws, an AC power cable, and basic instructional leaflets. There are no cable straps, cable ties, or other accessories of any kind. I am going to be building a PC with a flex atx power supply. I will be shortening the cables and doing custom sleeves regardless of which psu I choose. I also plan to replace the fan if necessary, and am considering an 80mm fan mod. My question is should I go with this FSP 500w 80+ Platinum OR the FSP 500w 80+ gold?

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SilverStone’s engineers managed to fit a switch next to the AC receptacle at the rear side of PSU. Concerning the tiny proportions of the unit, even the presence of a switch must have been a design challenge. The tiny 40 mm cooling fan of the PSU covers the rest of the rear side’s surface and is supplied by YS Tech, whose products we frequently encounter into middling-to-premium range PSU products.

Any thoughts? If any PSU experts can tell me if the components used are any good? Looks well build to me and they do provide clear images of the internals for people to see. FSP850-50FGPH3: The FSP850-50FGPH3 is an industrial level of switching power supply and meets 80PLUS Platinum efficiency. The power supply offers a total power capacity of up to 850 Watts, best for AI/GPU server, communication, or any other automation applications to use. The product also complies with the latest safety and EMC standards, which meet various regulations worldwide. There is only one significantly-sized heatsink inside the PSU, which is used to cool the two transistors that form a typical half-bridge primary inversion stage. The primary APFC capacitor is a 400V/220μF electrolytic capacitor made by Nippon Chemi-Con and is supported by a very sizable coil that takes almost as much volume as the main transformer of the PSU does.

I recently build a system in a K39 and by far the most difficult part of the process was settling on a good, affordable power supply that met the needs of my system. I’ve found that the Enhance ENP 7660b is a popular choice for many due to its silence, power, and efficiency. But for those looking to build a more modest system, as I was, I feel that something that powerful and expensive is a bit overkill and defeats the purpose of more budget-oriented sff builds.