As we already know the SilverStone SX750 a single 92mm fan design that is similar to the preferred 80mm cooling solution by some brands. The major downside to this fan design is that to move a sufficient volume of air to cool a high output power supply it must spin very fast resulting in elevated noise levels. While these 92mm designs are not great for quiet computing environments the key criteria in our evaluation is whether or not the cooling solution is sufficient, not necessary its sound level or form factor, and our comments on such later are not absolute decibel values.
External Build Quality
The exterior of the SilverStone SX750 is almost identical to the SX700-PT we most recently saw. Cosmetically, the side of this unit features that new SilverStone, and unit specific, branding. The modular interface is well labeled but lacks the pair of blue housing side connectors for the PCIe cables we have seen on other models. Rounding things out, the unit has a durable black finish and an overhead 92mm fan. One final note, there are two revisions to this unit currently (v1.0 and v1.1) pictured above.
The SilverStone SX750 comes in at a total length of ~4 inches while the cables come in at a length of ~16″ to 18″ to the first or only connector. Additionally, the cables are all FlexForce style cables which is excellent and it is fully modular.
Internal Build Quality
Once we open the top of the SilverStone SX750, we see a rather cramped unit that generally looks like other SFX units we have seen from SilverStone from a high-level perspective even though it is a new model. However, that is to be expected from high-powered SFX units as there are only so many ways to arrange things in such a small space. The topology features a resonant LLC primary with a synchronous rectification secondary and DC-DC VRM’s for the minor rails. The fan cooling this unit today is a double ball bearing Globe Fan fan rated at 0.45A at 12v and it is paired with one large heatsink and one very small heatsink. Lastly, the soldering is generally neat but there are a couple of hand touch-ups visible.
The SX750 input filtering begins upon the housing itself where we find some X capacitors and Y capacitors. The balance of the input filtering is found on the back edge of the main PCB. There is then a bridge rectifier next in line attached to a heatsink. The APFC coil is next and it is followed by the APFC power components and main switchers attached to the only substantial heatsink in the unit. Speaking of this heatsink, the main input capacitor is right next to it and it is provided by Rubycon with a rating of 420v 470uF 105C.
The secondary side of this unit looks crowded once more, but what do you expect from a 750W SFX unit? In the middle of this area, we find the main transformer. The MOSFETs, which are on the back of the main PCB, use the case as a heatsink rather than having their own dedicated ones here on the main PCB. Next to this, we find the DC-DC VRMs housed on their own PCB (populated by Nichicon solid capacitors) up against the modular PCB and edge of the main PCB. In front of these PCBs, we find a few solid electrolytics provided by FPCAP. The modular PCB construction looks very nice and there are more Nichicon solid capacitors here as well.
Build Quality Summary
Today’s SilverStone SX750 is the third SFX power supply we have seen from SilverStone and it seems to follow the general formula that the first two followed. The build quality looks very nice/excellent but this unit is, obviously, very small so it is a bit cramped. The exterior is almost identical to what we got with the SX700-PT as SilverStone has taken a shot at putting some branding in place today along with the FlexForce style cables. The integration seems to be very well done and the component selection is excellent as we see Rubycon standard capacitors as well as FPCAP and Nichicon solid capacitors. We also see a dual ball bearing Globe Fan fan used in this unit. All in all, the SilverStone SX750, like previous SFX units, is not the most visually striking unit we have seen, but it does seem to be well built where it matters. Let’s move on now to the load tests and see how this unit performs!