Technology content trusted in North America and globally since 1999
8,227 Reviews & Articles | 62,367 News Posts

ABS Tagan BZ900 900 watt Power Supply

By: Mike Wright | Other PSUs in Cases, Cooling & PSU | Posted: May 20, 2008 4:00 am
TweakTown Rating: 89%Manufacturer: Tagan

In The Box



Once we crack open the shrink wrap covering, we are left with a couple of nylon pouches that don't tell us a lot about the goodies at a glance. While some manufacturers have gone to a bag for the modular cabling assemblies, ABS/Tagan has added a protective cover for the primary unit.


We'll start with the power supply itself.



By the lack of visible cabling, it is easy to note that this is going to be a modular power supply. This is good news for those who want a PSU that will be used in an enthusiast rig since it allows you to use only the cables you need for your system. The rest stay in the nylon bag and out of the way so you won't have to try tucking them away somewhere so they are out of the way of your system airflow. This is always a nice feature and one that is becoming more popular amongst the manufacturers.


The outer shell has a matte finish that is also scratch resistant. While many may not see the use of this, I can say from experience that when I am always messing with something or other inside the rig, I can be rather harsh on that big box mounted firmly in the top corner of my case. This resistant coating helps make sure that even if you have a side window, your power supply will not be an eye sore inside the enclosure.


As far as power is concerned, the BZ900 is rated at 900 watts of continuous power usage. It has six 12v rails that can be run independently or together. Independently they are rated at 20A each and as a massive single 12v rail it is rated at a very impressive 72A. This should be more than enough to handle even the beefiest of power rigs. The 5v rail is rated at 26A and the 3.3v rail is also rated at 26A. This will allow a stable platform for either newer systems that need a hefty 12v rail or even that old box that needs a strong 5v rail. Both types of system will feel equally at home when powered by this PSU.



As is becoming commonplace, the external panel is basically a power port, a power toggle switch and a large mesh covering to allow for maximum airflow. I liked the protective covering on the power switch since this will keep dust and dirt from mucking the switch. For those with a sharp eye, you may have noted something else as well.



In the bottom right hand corner is a toggle switch that allows you to change the mode of the 12v rail. As noted earlier, you can either run this power supply with six independent 12v rails or as a unit with one strong 12v rail. This switch allows you to control that feature. The "Normal" mode sets the unit to provide power to six independent rails while the "Turbo" mode creates a single 12v rail with a 72A draw. You will have to get pretty extreme to really need the single rail, but in the event your system is that much of a beast, you will be set.



To make sure that enough airflow makes it through the unit and out the back mesh panel, Tagan has used a 135mm fan on the bottom. Like most other units on the market today, the fan is automatically controlled internally and it will increase fan speed when temperatures get too warm. While testing, I never noted the fans spinning at a higher rate, even when running in an enclosed system with a pair of very hot video cards. The fan also emits a blue lighting from the internal LED lights that are affixed to the fan housing.



The modular panel of the BZ900 is quite different than what I am used to. Instead of a coupler that simply clicks into place, this model offers ports that screw into the primary unit. While just a little more of a task to install, this will ensure a more solid connection to your cabling harness. It is going to take some serious punishment to get one of these to accidentally come undone.


Also of note is that the ports are all color coded. The green ports to the right handle one set of PCI-E cables, the red ports in the middle handle the second set of PCI-E cables, and the blue ports to the left handle your peripheral devices and SATA drives. It is also good to see that the main cabling coming from the housing is protected by a plastic grommet, making sure that your wiring won't get damaged over time. There is also a mesh coating over these cables to help make cable management tasks a bit easier to tackle.



Moving on to the actual cabling harnesses shows a little extra in the box. Not only do you get the modular cables, but there is also a small cross-tip screwdriver, main power cord, mounting screws and some zip ties, a rubber plate that negates vibration between the PSU and the enclosure, and even a pair of thin nylon gloves. I believe this is where the "value" side of things comes into play.


The cabling included with the BZ900 includes 6 Molex, 2 FDD, 8 SATA, 2 PCI-E, and 2 PCI-E8 (in a 6+2 design) connectors. All four PCI-E cables also include EMI shields to help make sure you get clean power to your hungrier components. Primary power comes in the form of a 20+4 pin main coupling and both 4-pin and 4+4 pin auxiliary couplers to handle pretty much any mainboard currently in use.


You will also note that the cabling harnesses themselves are color coded to match the ports on the back of the power supply. This will help you make certain that one of the 12v rails is not being abused, possibly causing system instability.



Above is a close look at the cable ends from the wiring harness. This is a pair of the PCI-E cables and they are covered with a heavy plastic shroud with no loose wires hanging out at all.


    PRICING: You can find products similar to this one for sale below.

    United States: Find other tech and computer products like this over at Amazon's website.

    United Kingdom: Find other tech and computer products like this over at Amazon UK's website.

    Canada: Find other tech and computer products like this over at Amazon Canada's website.

    We at TweakTown openly invite the companies who provide us with review samples / who are mentioned or discussed to express their opinion of our content. If any company representative wishes to respond, we will publish the response here.