Ripple is measured at the load by an USB Instruments Stingray DS1M12 .
I use the Stingray as a medium between the data being spit out by the
SunMoon load tester's Waveform Monitor output and my laptop. Each
change in voltage is collected and reported every .2ms. The time divide
on the graphs is 2ms (every square being 2ms)
The voltage scale on the graph is .05V, or 50mV. The
+3.3V, +5V and one of the +12V rails is measured at the main ATX
connector (the 24-pin.) +12V2 is measured at the 8-pin EPS+12V
connector and +12V3 is measured at one of the modular PCI-e connectors.
"Move along.. Nothing to see here folks..." The
Infiniti certainly has some well behaved waveforms. At it's worst, we
saw +12V ripple/noise at just a tad over 50mV. Specification allows
for 120mV! Nice!
Now that the Infiniti has gone through the wringer.. and lived... it's time to take it apart and have a look inside...
A Globe 135 x 25 95.77CFM ball bearing fan is used to cool the Infiniti.
The overhead shot shows a very typical PSU layout.
Single transformer for the +12V, smaller heatsinks, but with better
efficiency parts, cooling can be at a minimum.
Primary side over here. Note the big Hitachi cap here.
Now we're on the secondary side. It looks like we have an independent, as opposed to group, regulated design.
The capacitors on the secondary side are from a company called CEC-United Electronics Ltd.
I have never seen this brand before a few months ago, and every time
I've seen it it's been in an Enermax power supply (Infiniti, Galaxy,
Finally, here's a look at the back side of the modular
interface. This looks a lot more complicated to me than I think it
should be. :-)
Let's go ahead and score this thing, starting with performance...
The performance was great. The voltage regulation was
nearly perfect, the efficiency very good, the unit put out the wattage
Enermax claimed it to put out and it has power factor correction. It
scores a 10 for performance. That's makes up 40% of the score.
As for the functionality of this unit,
we should take into consideration that it already has a correct 8-pin
PCI-e connector on it, two of the 6-pin PCI-e connectors, 9 SATA and 9
peripheral connectors. Most of the cables are modular and there's no
reason to ever need to remove any of those cables that are fixed. The
24-pin connector can't be broken down to a 20-pin, but if you really
need a 720W Infiniti, I sure hope you're not still using a motherboard
with only a 20-pin ATX connector.
There are two issues with this power supply that will
hurt it's score here. The cables are very short and they are not
sleeved up to the last connector. So for functionality, I'm scoring
this power supply an 8.5. This will make up 20% of the final score.
Now for aesthetics. Certainly, judging aesthetics is
completely subjective. This is why it only makes up 10% of the final
The unit is compact and has a nice brushed finish that
almost made it look like it was made of aluminum. But like I said
before, the cables are not sleeved up to the last connector.
Fortunately, that's about the only complaint I have about the
aesthetics of this power supply. I'll give it a 9.5 for aesthetics.
Finally, I'm going to judge the valueof this unit. Basically, I'm going to look at what we have here in
terms of performance and functionality and compare it against what I
feel the product should sell for or what other products like it
generally sell for. This makes up 30% of the final score.
I found the Infiniti 720W for around $200, which puts
it in the neighborhood of other 800W units. In terms of apples to
apples, the SilverStone Decathalon 750W is also modular and fairly
efficient and has very much the same build quality, yet you can buy
that unit for about $20 less than the Infiniti. So I think I'm going
to give the Infiniti an 8.5 for value.
The Enermax Infiniti 720W gets a total score of 9.5 (rounded up from 9.2) and a "jonnyGURU Recommended."
Infiniti is a great product for Enermax. No, it's not as powerful as
the bigger brother Galaxy, but it does provide solid power, is
semi-modular and efficient, just like it's big brother. The
motherboard cables are a bit short, but that shouldn't be a problem for
those with a standard ATX case. I only see it being a problem with
cases where the power supply is in a separate chamber or the power
supply is at the bottom of the case. All and all, I can see the
Infiniti being a good, although expensive, investment.
Excellent voltage regulation
R600 and G90 ready with 8-pin PCI-e connector
Active Power Factor Correction
Very good efficiency
Nothing really bad to say
Short cables may be an issue in some cases.
Would like to see the cables sleeved fully sleeved
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