Enermax Infiniti 720w Modular PSU
Published: 5th February 2007 | Source: Enermax | Price: |Load & Efficiency Testing
To provide our readers with the most accurate results, Overclock3D uses a custom built PSU load tester on all reviews. This not only gives much more reliable results than the testing methods employed by other sites, but also allows for all current and future review results to be compared side-by-side.
Efficiency tests are performed by measuring the wattage consumed by the power supply at the mains (Mains Draw) against the power consumed by the OC3D power supply stress tester (PSU Load). These results may not be 100% accurate, but have proven to be extremely close to results obtained from professional equipment.
As of 01/02/07, all PSU reviews will feature test results for the PSU at 0%, 50% and 100% load. The table below defines the load (in watts) placed on each rail during these tests.
| +3.3v Rail||0w||33w|| 66w|
| +5.0v Rail||0w||50w|| 100w|
| +12v Rails||0w||240w|| 480w|
The results are collected from a Mastech MAS-345 Multimeter which logs its readings via RS232 to a PC.
Efficiency was fairly average for this type of power supply, managing almost 82% efficiency at a 646w load. As you may have seen in the Infiniti's specifications, the unit is 80+ certified. This essentially means that in any given situation, the Infiniti will be able to manage at least 80% efficiency, hopefully provide you with savings on your energy bill and helping the environment in the process.
In our continuing efforts to make power supply reviews more thorough, rather than simply checking voltage stability, Overclock3D will now be recording the temerature of each PSU as it undergoes testing. Temperature recordings will be taken from the PSU's outer casing at 0%, 50% and 100% load levels in an attempt to gauge how much heat is likely to radiate into the end-users case, and how effective the cooling methods are.
It is certainly safe to say that users of the Infiniti PSU will see very little 'heat dump' into their cases and may even see a reduction in case temperatures when switching from a less efficient power supply.
Possibly the hardest part of any PSU review is summarising the level of noise given out by the unit. The threshold for what is considered 'noisy' varies from person to person and therefore what I may consider a quiet unit, another person may consider extremely loud. A common way to resolve this issue is to use a dBA meter to measure the units noise level, however this doesn't take into account the pitch (type) of noise emitted and whether it is likely to irritate end users.
For this reason OC3D records all power supplies at idle and load in wav format for you to make your own informed decisions. All recordings are taken at 30cm away from the PSU and outside of a PC case. You will need to remember that noise levels will be reduced by varying amounts once the PSU has been installed inside your PC enclosure.
0% Load Recording - Download
50% Load Recording - Download
100% Load Recording - Download