Our load tests utilize a couple of FAST ATE active load testers and a variety of other equipment such as an oscilloscope, power conditioner, temperature probe and a power consumption meter. You can read more about our standard testing approach here.
The tests performed are based around six conceivable setups that are out there and progressively load down the PSU up to the power supply's limits or 1000W, whichever comes first. Since our test equipment's limits are lower than that of the FSP Aurum Pro Gold 1200W PSU, we can only test it to 1000W.
The above tests represent typical loads that we have measured from various systems and are meant to give a rough idea of where your computer might fall in line with our tests. Please keep in mind that each system is different and actual loads can vary greatly even with similar hardware.
Let's start by taking a look at the voltages to see how well this unit did during testing. Starting with the 12V rail, we see 2% regulation from with a total drop of .19V from start to finish. The 5V rail also stayed within 2% voltage regulation and displayed a total drop of .09V. Moving towards the 3.3V rail, we see that regulation was again within 2% with a total voltage drop of .05V.
DC output quality was very good from start to finish. Starting out, we were barely able to see a ripple on the scope during Test 1 where we measured noise at a low 15mV peak to peak. This steadily increased as the loads also increased. By the time we had reached around 50% load, the unit ripple had crept up to 29mV. Under Test 6, we saw that the noise on the 12V rail had crept up to 49mV. This is representative of 83% of the total output of this power supply.
The FSP AU-1200PRO is rated for 80Plus Gold efficiency. This means that the power supply must perform at 97%/90%/87% efficiency at 20%/50%/100% loads respectively. As you can see, the FSP AU-1200PRO had no trouble achieving this while on our test bench and was very close to achieving an 80Plus Platinum rating.
FSP's AU-1200PRO is a very mixed bag of tricks. On one hand, we have a power supply with excellent power regulation, good DC output quality and excellent efficiency. 1200 watts is a lot of power to put out cleanly and efficiently and to make it all come together like FSP has done is no small task. The addition of flat, modular cabling was much needed by FSP and goes along great with the AU-1200PRO. Once you figure in the price of about $225 for a 1200-watt unit capable of providing power to three video cards with a five year warranty, you've got a serious contender for those in the market for a power supply that can do more than 1kW.
Unfortunately, FSP has made a few poor selections with the unit that will severely limit the viability of the unit for a vast majority of those who are in the market for such a powerful unit. The decision to utilize the same modular connection for the fourth set of PCI-E connectors and the second EPS12V connector means that most won't be able use this power supply if they intend to use it in a four-way video card system. The odd selection of connector availability and cable layout doesn't help matters either, but it shouldn't be a huge setback for most.
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