Seasonic X900 SS-900HP 900w PSU
Internals & Cables
In the past, many people have judged the quality of a PSU on its weight and size of internal components. However, with many manufacturers moving on to newer and more efficient ways of designing their PSU's, it has become increasingly obvious that this is no longer a reliable method for gauging a power supply's quality. By looking inside the X900 we should be able to identify some of the components used and get a good feel for the overall build quality of the unit.
On opening the X900 the first thing that stands out is the large aluminium heatsinks responsible for cooling the the two banks of mosfets attached to them. Sandwiched between the heatsinks are two transformers and a capacitor. The larger of the two transformers (left) is most likely responsible for the +12v rails, with the smaller transformer (upper-right) responsible for both the +3.3v and +5v rails. At the centre is a large black capacitor manufactured by Japanese company Nippon Chemi-con.
The overall layout of the X900 is fairly spacious, with plenty of room between the 80mm fan and component board to prevent any cooling dead spots. The aluminium heatsinks are finned in a way that aids the flow of air through the unit and all cables are bundled together with zip ties, giving the inside of the unit a very tidy appearance.
With many PSU manufacturers designing their latest models with 120mm fans it seems rather strange why Seasonic, a manufacturer often associated with silence, would opt for an 80mm fan to cool the X900. However, as many previous reviews on Overclock3D have shown, 120mm fans can be just as loud as as their smaller counterparts when not controlled properly. The specifications for the fan used in the X900 can be seen below:
• Model: AD0812UB-A71GLCables & Connectors
• Size (mm): 80x80x25
• Bearing: BALL
• Speed (RPM): 3900
• Airflow (CFM): 50.0
• Noise (dBA): 41.0
Both the Molex, PCI-E and motherboard power cables are sleeved up to the very last connector in black mesh and finished off with zip ties covered in black heatshrink tubing. Strangely Seasonic have decided not to sleeve the SATA cables past the first connector, which makes the unit looks slightly untidy - and left me wondering why they didn't complete the job.
However, it has to be said that the quality of the sleeving is exceptional and I was also pleasantly surprised to see that Seasonic have opted for 'Easy Grip' molex connectors - making the removal of the connectors from devices easier.
Most Recent Comments