Zitat

4.3. Anschluss „Lüfter 1/2/3/4“
Geregelte Lüfterausgänge mit Tachosignalauswertung. Die maximale Belastbarkeit
jedes Ausgangs beträgt 19,8 W (1,65 A bei 12 V). Die Belastbarkeit
ist dynamisch begrenzt durch Temperaturüberwachung.
©

Das kommt auf die Lüfter an, dürfen halt nicht mehr als 0,33A bei 12 Volt(3,96 Watt) zischen, aber wen du die 1.65 A pro Kanal aufreizen willst muss gut Luft an den Wärmetaucher des AE´s kommen oder du nimmst gleich den Wasserkühler.

You could use an Aquaero 5 LT as Slave. It would be the same as four Power Adjust 2, but a Power Adjust 2 can handle 25 Watts of power and an Aquaero 5 LT can 'only' handle 4x19,8 Watts (19,8 W per channel). Also, if you connect that many fans to the Aquaero 5, you need a cooler.

Passive with an air flow...

or active with water...


Quick installation guide for aquaero 5, PDF format.

No, of course not. Its a specialist waterblock designed to fit the VRM's on the AQ5. It won't fit anywhere else, there would be no mounting holes for it to begin with.

Hi there I have spent a considerable sum of money on Aquacomputer components. My current build has 40 fans (Noiseblocker E-Loop 2400rpm), I am using the aquaero 5 XT and 6 power adjust 2 Ulta's.
What I have learned is if you plan on playing with the fan speed any, it seriously reduces the amount of fans you can place on any single channel or individual poweradjust. The disadvantage to the poweradjusts is there is no waterblock option, nor do I think it would be practical to daisy chain liquid cooling from each power adjust as the restriction would be tremendous. I have found that 4 fans on a single power adjust works fine until I try and change the rpm. With 4 fans on a single PA2U running at 50% power the PA2 overheats very quickly causing the fans to cycle between 100% and 50% which is very annoying to listen to.
Then only solution I have found for this is add yet another fan to my system for the sole purpose of cooling the PA2U's.
Really it all depends on if you want to adjust fan speed or not, the aquaero and the PA2's heat up a ton if you start changing fan speeds.

The E-loops are very power hungry fans compared to other similar speed 120mm ... That is some of your problem.

4 B12-4's adds up to nearly the whole 2 amp limit for a power adjust.






With 2 SP 120 on channel 1 and 3 on channel 2 my fan amps running them at 1100RPM are at 45C vs 37C on channel 4 with a single fan.

Thanks for the informative post! I am recording a lower amperage reading (.41a) then the chart you posted but higher then the packaging's tech data (.32a). The total load I am measuring is 1.65a at the PA2 using a multi-meter. One thing I noticed watching the video on the coolingtechnique site was the amperage at each voltage was lower than charted when going from 12v-0v verses 0v-12v by about half of an ampere.
I would still have to say if you plan on using the PA2 to it's full potential of 2a be aware that if you reduce the voltage (which also lowers the amperage) it overheats quickly if you do not have a cooling solution such as a fan blowing air across the PA2. I run four eloops B12-4's reduced by 50% for a total load of less than 1amp at the PA2 (using either my measuring or the charted data the load at the PA2 is less than 1amp).
Again thanks for the informative post and providing the chart data!

Interesting. I agree it must relate to the type of fans.
I have ran as few as 3 AP-15's seriously undervolted from a PA2, and never saw the PA2 temps rise above the low 60's.
On another PA2 I was once running 5 AP-15's undervolted considerably with no problems.

I've since changed to running dual Aquaero's & no PA2's but that was related to having another pwm fan header, not PA2 problems.

Cooling the PA2's with a separate fan sounds like a good solution, is that not working well enough?

Zitat von »mandrix«

Interesting. I agree it must relate to the type of fans.
I have ran as few as 3 AP-15's seriously undervolted from a PA2, and never saw the PA2 temps rise above the low 60's.
On another PA2 I was once running 5 AP-15's undervolted considerably with no problems.

I've since changed to running dual Aquaero's & no PA2's but that was related to having another pwm fan header, not PA2 problems.

Cooling the PA2's with a separate fan sounds like a good solution, is that not working well enough?

Now you have me wondering if you have a great batch of PA2's or if I have a very poor batch. Are you saying you are able to overload a PA2 to 2.5A-4A then undervolt it without it cycling?
(AP-13 is .34A @ 12V, AP-14 is .49A @ 12V, guessing AP-15 is .83A @12v)
Adding another fan to the case to cool the PA2's does work, it is just not the look I wanted to have in my build, especially when I am not coming close to exceeding the ratings of the PA2's.
AS13-2 reports my problematic PA2's loads of 1.42A @ 12v

lol. You need to move your decimal to the left one place. The AP-15's pull .083A.
Using either the Aquaero or the PA2's I can undervolt the AP-15's to < 4V, BTW.

Also my PA2's were bought at different times, so it's most likely nothing to do with lot or batch.

I wonder if you don't have a bad fan or a short somewhere. Don't know how you have your fans wired, but some of the "store bought" fan harnesses are pure crap. I make all my own wiring up so I know it's right.

I can definitely see where using several water blocked Aquaero's might work out better for some than using PA2's. But it's all about balance and using the right equipment for what you are trying to do.

For me using two Aquaero's and dropping the PA2's just works out better all the way around, and I have them both water blocked.

Seeing as you have 40 of the fans then surely you don't need all the speed the fans offer?

If you use low noise adaptors or voltage reducers on the fans to lower their top speed it means the fans need to be undervolted less to reach the minimum speed you want, and therefore less heat.

I really wanted to try the eLoops but the current draw put me off even on the B12-3's ... I notice in several reviews I have seen that the fans don't reach their rated top speed. I wonder if this means that they need a while to run in and reduce friction on their bearing system? If it does that would mean that load would decrease over time as you use the fans.

Mandrix - I guess my frustration is expecting the products to perform at their rated/recommend specs without additional modifications needed. The closest analogy I can come up with is if I purchased a high end home audio amplifier and had to point fans at the thing to get it to put out it's rated output I would be extremely disappointed as well.
Earlier in this thread you mentioned that you loaded and undervolted a PA2 with 3 AP15's and as many as 5 AP15's, at the current draw you talking about a load of less than half of one amp (about .42a). I completely agree you can load a PA2 to 15%-21% of it's rated 2amps and undervolt it with no heat issues. It is when you place a load from 60%-100% of the rated 2amps that heat issues become apparent.

Would you mind sharing what load (in Amperage) you are placing on each of your fan channels? I am wondering how close you are to using them to their rated potential without having heat problems.
The PowerAdjust2 Ultra's are rated at 25w continuous 48w peak. Therefore a single PA2U should be able to power (24) AP-15's with a current draw of .083A each, however I believe that once you begin to use the "Adjust" features of the PowerAdjust2 you are going to quickly notice overheating of the VRM's. The PA2U see's (4) NB B12-4's as nearly the same as (24) AP-15's.

(4) Noiseblocker eLoop B12-4's
Current draw @ 12v 1.96a
Wattage @ 12v 23.52w

(24) Scythe Gentle Typhoon AP-15's
Current draw @ 12v 1.992a
Wattage @ 12v 23.904

Zitat von »Jakusonfire«

Seeing as you have 40 of the fans then surely you don't need all the speed the fans offer?

If you use low noise adaptors or voltage reducers on the fans to lower their top speed it means the fans need to be undervolted less to reach the minimum speed you want, and therefore less heat.

I really wanted to try the eLoops but the current draw put me off even on the B12-3's ... I notice in several reviews I have seen that the fans don't reach their rated top speed. I wonder if this means that they need a while to run in and reduce friction on their bearing system? If it does that would mean that load would decrease over time as you use the fans.

Jackusonfire,

I appreciate the help as this is something I truly want to solve. I am beginning to wonder if removing the heatsinks and replacing the TIM might be worthwhile.
Only during prolonged extreme overclocking sessions do I need the full speed the fans offer. As I do occasionally need full power adding and removing resistors to the fans is something I am trying to avoid. I will do some testing on some of my eLoops to see if their rpms have increased since being placed in the system and report the findings. It would be interesting to see if their performance has improved or stayed the same. (I have some spare unused eLoops to use as comparisons).