ABS / Tagan BZ900 900W Power Supply Review

Output Characteristics


So, now we come to the real meat of this power supply with its rail outputs. Tagan has gone ahead and put six +12V rails each with an amperage of 20A (240W) which should be more than enough to power literally any combination of graphics cards and processors. There is also the option to combine all of the rails into a single rail via the “Turbo” mode which brings these six rails crashing together to form a titanic 70A (840W) +12V rail. This large allotment on the +12V rail is exactly what we want to see with any modern power supply since the most power-hungry components on the market (processors and graphics cards) draw their power exclusively from the +12V rail(s). Therefore, seeing a power supply like the BZ900 which has about 93% of its available output accessible through the +12V rails, should bring a smile to the face of many an enthusiast out there.


Interior Impressions


Like all Tagan power supplies, the BZ900 is made by Topower who has had a somewhat spotty reputation when it comes to the quality of the products they produce. Fortunately for this power supply, it looks like Topower has hit the nail on the head with an exceedingly clean and well-appointed layout. In the past it has been observed that Tagan seems to get the pick of the litter when it comes to Topower units and the BZ900 seems to prove this observation. However, there seems to be some interesting things going on once we look a little further.


The primary side has a single Teapo 85°C rated capacitor which is par for the course but it is a bit surprising not to see a 105°C rated cap. We suppose this is due to the fact that Tagan assumes the 135mm fan is sufficient to cool off the interior of this power supply enough that the higher-rated capacitors are not necessary. Meanwhile, the secondary side holds a few surprises…namely in the form of Samson capacitors. While they were to far recessed into the bundle of cables to get a good shot of them, these caps seem to be mimicking the popular Samxon caps which are seen in some power supplies. Additionally, we were not able to identify the black capacitors in the picture above so this all adds up to make the capacitor offering on the secondary side a very much mixed bag.


The modular interface is extremely well done with clean solder points for all of the connectors which ensures good transfer of power from the internal wires to the connectors on the modular interface. There are also a pair of fan headers which may point to the possibility that this power supply was originally designed for a dual-fan setup much like the ITZ series has. There is also an adjustable POT here which seems to control the rotational speed of the fan.