LEPA MX F1 600W Power Supply Review

LEPA does not have much to say in terms of marketing about its new MX F1 power supply line. Outside of "Racing car style coating" and "Extremely Silent fan," we have very little to go on, except one thing. 600 watts of good PSU power priced at $49.99 with Free Shipping with be a very good value, if it's "good" power.


Load Testing

For those of you that are curious as to some of the reasoning and equipment behind our PSU testing program here at HardOCP, we have put together a living document that shares a lot of the behind the scenes of the program. The testing we are conducting today is exactly as described in that document and will begin with a range of loads tested at 120v input including our torture test and then move on to the same set of tests at 100v input but without the torture test.

100v Load Testing Results

Article Image

Test #1 is equal to approximately 25% of the rated capacity of the MX F1 600W at 45c. This makes Test #1 equal to 150W by loading the 12v rails to 10a, the 5v rail to 2a, the 3.3v rail to 1a, the +5vsb to 2a, and the -12v to 0.5a. The results of Test #1 at 100v show the main positive DC output voltages starting off as they did at 120v AC input. The efficiency for this unit has taken a hit, as expected, and is coming in at 76.80%. The exhaust temperature is coming in at 52C.

Test #2 is equal to approximately 50% of the rated capacity of the MX F1 600W at 45c. This makes Test #2 equal to 299W by loading the 12v rails to 20a, the 5v rail to 6a, the 3.3v rail to 4a, the +5vsb to 2a, and the -12v to 0.5a. Test #2 sees all of the DC output voltages drop, but the 12v and 5v rails have not just dropped they have collapsed! Indeed, while the change on the 3.3v rail is 0.04v the change on the 5v rail was 0.8v! While the 5v rail was impressively bad, the 12v rails manage to do worse with a drop of up to 1.6v! The efficiency has only moved up in this test a little bit as it comes in at 67.83%. Wait, that isn't up, that is down...by a lot! On top that, the exhaust temperature has moved up to 75C!

Following Test #2 both LEPA MX F1 600W power supplies we had failed to turn on or were dangerously out of specification. They did complete Test #2 but that was it. As such no further testing was completed by either unit.

100v Load Testing Summary

And with that, the LEPA MX F1 600W went from being literally one of the worst performing products we have ever seen to something worse than that. This unit is just impressively foul to the point that it is actually worse than the likes of the Ultra X2 Extreme Edition 750W (aka Exploding Edition), VisionTek 700W, and the Diablotek PHD650. The only good news is that when this particular PSU crashed, it didn't take any of our expensive testing equipment with it as has happened in the past. Now, had this PSU been in someone's PC rather than on the load tester that may well not have been true. Indeed, the only impressive thing about this unit’s performance so far is that it was so bad and it managed to make it through Test #2 with voltages far out of specification. For those wondering, no, your system would likely not run with 12v outputs this low. So congratulations are in order, Lepa/CWT have managed to provide a power supply that will somewhat stably provide users with just ~10v on the 12v rail in our tests! That is a first! Do we have to move on to the next part of testing?