This review is one of a series of PSU reviews, if you have not read any of the others you can read all about the test set up and methodology below.
  1. Testing Overview
  2. Wattage
  3. Parameters
  4. Methodology


TTGI/SuperFlower Plug-N Power 550W

A naked dog competes against it's brand name cousin...

Like the Mad Dog we reviewed, people are going to consider the TTGI Plug-N Power because of power, price and modular cables.  550W is certainly a pretty powerful sounding number, and the TTGI branded Superflower power supply costs even less than the Mad Dog.  The modular cables are just like those on the Mad Dog and still allow the user to only add the cables they need, keeping the inside of the case neat and clean and capable of better air-flow.

Here's our TTGI/SuperFlower and Mad Dog (left to right) next to each other. Quite different looking on the outside. The interfaces for the cables are similar, but are arranged differently.

Inside, the two look VERY similar.  Note the same transformers, heatsinks, etc.  The fan controller on the TTGI (the small red board) is a bit different.

This extra circuit board is installed on the input side of the TTGI/Superflower. It looked a lot like Active PFC, but my model didn't have PFC and the .70 PF rating proves it.

The cables are similar to that of the A.C. Ryan and are just like the Mad Dog's.  The connectors snap into the power supply so they shouldn't come out and there's even a dedicated SATA power connector that provides 3.3V for future SATA drives (currently, SATA drives only use 5V and 12V, but 3.3V is in the specification.)  They're not as pretty as the Ultra's or even the OCZ's, but they're acceptable.

The ENORMOUS 140MM fan with it's four blue LED's.

On the back of the power supply, there's a little push button and three lights.  When we push the button, the RPM of the ENORMOUS 140MM fan changes.  What's nice is that the slowest setting allows the thermostatic control to override the low RPM, so when you start using the PSU and it gets hot, the fan kicks up a few revolutions to compensate.  The other two settings are faster and are labeled "normal" and "turbo."  Even at full speed at the fastest setting, the fan was still VERY quiet.  I want all power supplies to have 140MM fans in them from now on!  This thing is fantastic.  The PSU was typically around the neighborhood of under 35 degrees Celsius, and when the PC is shut down, the fans kept spinning for a couple of minutes so the temperatures never exceeded that number!

A Honeycome grill for good air-flow.  You can also see the fan-speed selection button here.

All of the way to the right of the SunMoon where it says "AC" is where the light is to tell me the power supply is on.  The light is out.  This is the power supply in it's "cool down" mode where the fan spins for five minutes after power off.  Note the 2A load on the +5VSB and the 17mA load on the 12V.

Inside we see typical SuperFlower neatness.   This is something that's hard to do with a modular unit.  But like the Mad Dog, the cables are all routed behind the interface PCB.   The heatsinks are still rather small, and the transformers are small, but it looks like the AC filtering caps got an upgrade from 1000uF to 1200uF.

Once again we see wires routed BEHIND the modular interface card.

Bigger caps (1200uF) can be found in the TTGI/SuperFlower (Mad Dog uses 1000uF) and the chopper gets a heatsink where in the Mad Dog it does not.

The only thing similar about these two labels is the 3.3V, the 12V and the UL listing number.

Reading the labels and counting the cables.....

So what does the TTGI label look like?

TTGI Plug-N Power 550W +3.3V +5V +12V -12V -5V +5VSB
Max Output Current 35A 50A 30A 1A 1A 3A
Max Combined Peak Wattage 275W 360W 12W 5W 15W
518W 32W


Let's take a look at what connectors we get with this power supply.  Keep in mind this unit is modular, so these numbers can change by simply swapping out a cable.

Once again, the SATA connector allows for the 3.3V lead.  Other modular power supplies, and the use of adapters, negates this voltage.

ATX connector 24-pin
2 x 2 12V connectors 1
2 x 3 PCIe 0
6-pin Xeon/AUX connector 0
5.25" Drive connectors 7*
3.5" Drive connectors 2
SATA Drive power connectors 2
Fan only connectors (thermostatically controlled 12V only) 0

* One of the 5.25" drive connectors has additional EMI filtering for use exclusively with a hard drive or video card.

Note the lack of a PCI Express cable.  Also there are no fan only connectors and no AUX connector.  There are plenty of 5.25" Molexes, but only one with the EMI filter, similar to those found on the Raidmax power supply, on it (not to say that the filter on the end of the cable actually makes much difference.)  In a PCI Express system, I would use this connector with an adapter for my video card.

Results and Conclusion

Mad Dog MD-500SCPS Zero Load Test One (364W) Test Two (306W) Test Three (465W) Full Load (554W)
12V 12.14 11.8 12.5 11.15 11.54
5V 5.20 5.08 5.05 5.06 4.98
3.3V 3.46 3.41 3.41 3.40 3.38
Efficiency 29% 74% 75% 71% 63%
Power Factor .53 .70 .68 .72 ..73

Temperature under load = 34.8.  Temps didn't rise after power off, but got as high as 54.1 during the full load.

Power factor is an option for this power supply.  As tested, the power supply had a PF average of 74%.  Not bad, and actually better than the Mad Dog.

This power supply exhibited a lot of the same "issues" as the Mad Dog.  As long as the 12V was what was fully loaded, all of the rails looked good.  And as with most newer power supplies, if I load up the 5V, the 12V rises.  But the odd thing this, and the Mad Dog, did was the 12V dropped out of spec when both the 12V and 5V were pumped up.

I managed to get 554W out of this power supply by leaving the 12V rail at 30A and the 5V at 35A.  The 12V started creeping back up and I bet if I lowered the 12V back down, the voltage would start to come back up even more just as it did with the Mad Dog.

Despite knowing my loads are unrealistic on the extreme end of the spectrum (you're not going to load a PC up this much for this long of period of time,) I'm still going to count this exhibition of flakiness as a point against.

With added features like the "5-minute ramain running" fan (Superflower didn't come up with a neat term for this) and the quieter 140MM fan that kept things VERY cool, this PSU get's another half of a point over the Mad Dog.  The lower price gives it yet another half of a point!

This power supply gets an overall rating of 8.5.

I want to thank Spectre from over at [H]ardForums for letting me borrow his power supply.  I'm glad I didn't blow it up. I want to also thank Ice Czar for his insightfulness as wisdom.  If anyone has any suggestions or would like to send a power supply in for review, please contact me.

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