Tests
Since the Antec Neo HE 550 power supply was already installed in the system, I tested it to get some base values to compare against. Before showing you these numbers, keep in mind that the values we got when we previously reviewed this power supply were achieved on an entirely different computer that consumed far less power.


While every number you see here is under the optimal 3.3, 5 and 12 we would like to see, they are still very much within spec. A power supply with these numbers will not necessarily cause your system to underperform, but, as stated, they are not optimal. The more important thing to note about these numbers is the fluctuation you can see under different loading conditions. Ideally, a power supply’s voltage will remain constant under any possible loading condition. You can see that the Antec Neo HE 550 was pretty good in this area, only fluctuating by .04 Volts at most. Now let's take a look at the numbers when overclocked.


Although the voltages moved a bit further from the optimal values, they still stayed well within spec. Also notice that the system power consumption got up to 415 Watts under full load, placing a 75% load on the PSU. Overall the numbers for the Antec Neo HE 550 were good, but they could be a heck of a lot better.

Silencer 750 EPS12V

We already know that the Silencer 750 should get better numbers than the Antec Neo HE 550 due to the expected quality of PCP&C power supplies. However, the numbers are also going to be better due to the fact that the Silencer 750 is a more powerful supply. This basically means that the load we will be placing on the 750 will be coped with much easier than it was with the Neo HE 550. With that said, let’s take a look at the rails while the system is at stock settings.


Notice anything? Not only are the numbers MUCH closer to the optimal values overall, they barely fluctuate AT ALL. Also notice that the +12V rail (by all accounts the most important rail in modern systems) is pretty much right on target. This is extremely impressive, and also expected considering the tremendous power that it alone produces. However, the power supply is only being required to produce 345 Watts under full system load. Let’s overclock and see what this power supply can really do.


As you can see, there is almost no change whatsoever. This bodes very well for the Silencer 750 EPS12V, as it proves beyond a shadow of a doubt that this power supply is more than capable of both powering very high-end systems, and doing so in an extremely impressive manner. There was practically zero rail fluctuation in all of my tests with this power supply, a characteristic that is rarely seen on high-end systems. Also notice that even with the load of ~410 Watts we generated, the power supply is only running at about 55% capacity, significantly less than the 75% on the Neo HE 550.