Mistel Vision MX650 Fanless 650W Power Supply

REVIEW INFORMATION
SUPPLIED BY: Mistel
PRODUCT: Mistel Vision MX650 Fanless 650W
PROD LINK: MX650 Fanless Product Page
PRICE: $159.99 MSRP
Price is at time of testing!

As always, we’ll do our dirty work using a FastAuto FA-4200ATE to load the unit. Then, a bunch of other goodies will get the data we need to see how this performs, including an Extech True-RMS multimeter, Tektronix TDS-2012B scope, dual probe thermometer, and a Rek RF9901 power meter.

MX650 Fanless – STANDBY Load Tests
Test # +5VSB DC Watts/
AC Watts
P.F. Eff.
1 0.5A 2.54W/
3.13W
0.326 81.0%
5.07V
2 1.5A 7.56W/
9.78W
0.480 77.3%
5.04V
3 3.0A 14.94W/
19.9W
0.543 75.1%
4.98V

Standby tests come first, of course. Here we see that the unit is above average for efficiency, but there’s nothing too groundbreaking about those numbers. I’ve seen up to 87% from certain units in these tests, which is really impressive.

Less than impressive but still pretty good is the voltage regulation, which measures at 1.8% on this particular unit.

MX650 Fanless – Cold Load Tests
Test # +3.3V +5V +12V DC Watts/
AC Watts
AC
Input
Eff. P.F. Intake/
Exhaust
Progressive load tests
1 1A 1A 4.6A 65.2W/
75.8W
119.5V 86.0% 0.954 24°C/
24°C
3.311V 5.02V 12.08V
2 1.5A 1.5A 9.5A 129.8W/
144.5W
119.6V 89.8% 0.986 25°C/
27°C
3.311V 5.02V 12.08V
3 3.5A 3.5A 24A 326.5W/
358.2W
118.9V 91.2% 0.992 28°C/
30°C
3.307V 5.02V 12.08V
4 5A 5A 36A 486.4W/
536.3W
118.2V 90.7% 0.994 31°C/
34°C
3.303V 5.01V 12.08V
5 7A 7A 48A 652.1W/
731.1W
117.6V 89.2% 0.996 38°C/
38°C
3.297V 5.00V 12.07V
Crossload Tests
CL1 12A 12A 0A 100.8W/
120.7W
118.5V 83.5% 0.978 40°C/
38°C
3.294V 5.00V 12.09V
CL2 0A 0A 54.1A 653.7W/
728.8W
117.0V 89.7% 0.996 45°C/
40°C
3.299V 5.00V 12.06V

Moving on down to the main tests, we find the unit struggling a little bit on the efficiency side of things, but thanks to me allowing it that 1% margin of error to compensate for the power meter accuracy, it does hit Platinum. Just barely. And the 10% load level in test one is still a very nice number, considering that 80 Plus has no requirements at that load level for anything below Titanium.

Over on the voltage readings, again I find myself confused about what we saw on the last page. These numbers are really impressive for nearly any manufacturer, but exactly what I would expect from something built by Seasonic. It’s just… I don’t know if this unit has anything to do with them yet. On the 3.3V rail, I have 0.52%. The 5V rail? 0.40%. And the 12V? 0.25%. That averages to a mythic 0.39%.

I remind you that last week I had to change my scoring methodology to account for the abysmal crossload regulation of an old group design that did neither of the two crossload tests well. Using the old scoring system, this unit would have scored even better than the numbers I just mentioned. The fact that this unit still managed these numbers after the scoring change? That is really, really impressive to me. No matter the OEM, Mistel looks to be dead serious about getting money out of our wallets.

Let’s see if it can keep this up on the next page.