Enermax MODU87+ 700w PSU Review
The following results below represent the 'worst-case' output of the Enermax MODU87+ 700w PSU during a 1 hour testing period. Recording of these results was conducted using a SunMoon SM268+ load tester connected to a PC via RS232, a Fluke 50 Series II thermometer and a Rigol 25Mhz 400MSa/s oscilloscope inside a custom made heat chamber capable of maintaining a 50ºC ambient with a variation of less than 5%.
|Enermax MODU87+ 700w @ 50°C|
|+3.3v||+5.0v||+12v||+5vSB||-12v|| AC Watts / |
|Efficiency|| Intake / |
|3.25A||3.25A||11.50A||0.75A||0.12A||187w / |
|92.51%||50.1°C / |
|7.50A||7.50A||23.00A||1.50A||0.25A|| 350w / |
|92.63%|| 51.7°C / |
|11.25A||11.25A||34.50A||2.25A||0.37A|| 571w / |
|91.94%||50.5C / |
|15.00A||15.00A||46.00A||3.00A||0.50A||777w / |
|89.70%|| 51.8°C / |
|16.00A||16.00A||1.00A||0.00A||0.00A||167w / |
|85.62%||51.5°C / |
|1.00A||1.00A||58.00A||0.00A||0.00A||766w / |
|92.16%|| 50.8°C / |
|17.00A||17.00A||58.00A||3.00A||0.50A||946w / |
|90.16%|| 51.1°C / |
To reiterate what's already been said over on the previous page, the MODU87+ shows excellent voltage stability on the +12v rail across all loads including the cross-load and max load tests. The +3.3v and +5v rails also manage to hold good voltages through tests 1-4, and only really trip up in the max load test.
Efficiency is among the best we've ever seen with the unit averaging around ~90%. Even in test 5 where most PSU's barely manage to achieve 80%, it pumped out a respectable 85%.
Temperatures are also under control for the most part with the exhaust temp only rising 10.7°C above the 51.8°C ambient temperature during test4. Only in test 7 where the MODU87+ was running 150w above its rated output did the unit start to loose control with the exhaust temp hitting 71.7°C, but this is to be expected as Enermax have most likely only tuned the fan control to deal with loads of up to 700w.
|Enermax MODU87+ 700w Scope Results @ 50c |
Moving on to the ripple results now, and the first thing that shows up is just how good the suppression on the +5v rail is. Seriously, the flat line across all of the tests would have paramadics administering epinephrine in an attempt to bring it back to life. For some reason though, the +3.3v rail doesn't share this trait, and instead sits between 20-30mVpp through the testing. Of course, this is by no means a poor result. But with both rails using exactly the same VRM's I do have to wonder why.
The +12v rail is yet another interesting (yet boring) result because much like the +5v rail, it hardly changes regardless of the load. Test1 is the same as Test4. Everything in between is pretty much the same. And the Max load result taken at 850w is only 4mVpp higher than at 170W!
Now let's try and cobble together some form of conclusion...