<div>
I don't understand the specs for the power supply. &nbsp;Do you have a part number? &nbsp;<br />
I don't know what <b>standard</b> means.<br />
<br />
Where are you getting these data:<br />
&nbsp; &nbsp;12.0 V @ 65 A &nbsp;= 780 W<br />
&nbsp; &nbsp; &nbsp;5.0 V @ 20 A = &nbsp;100 W<br />
&nbsp; &nbsp; &nbsp;3.3 V @ 24 A = &nbsp; &nbsp;80 W<br />
<br />
This is a total of 960 W, more than the 850 you mentioned. If all you need is 12 V, you should not connect anything to the 5 or 3.3 V outputs.
</div>


<div>
Power supplies have various ratings. &nbsp;One is the overall one (which in this case is 850 watts). &nbsp;That is the maximum output.<br />
There are various other ratings. &nbsp;In this case (12 volts 780 watts, 5 volts 100 watts {20 amp from your figure}, 3.3 volts 80 watts {24 amps from your figures}) for a total of 960 watts. &nbsp;960 exceeds the 850 and is unachievable. &nbsp;What happens if that the figures quoted 780, 100, 80 are the maximum available for that voltage if the <b>other voltages</b> aren't running at their maximum draw. &nbsp;Thus you'll get 5 volts 100 watts if the other two voltages aren't at maximum draw.<br />
<br />
Thus you still are limited to 850 watts maximum.<br />
<br />
For your purposes I'd recommend just using the 12 volt power line.<br />
<br />
Now I suspect that the PSU may not be able to handle the transient demands of the amplifier, sudden demands on it for peaks of music. &nbsp;Might be wrong but wait for other experts to comment.
</div>


<div>
as dburton says<br />
For your purposes I'd recommend just using the 12 volt power line.<br />
<br />
you said you needed <br />
&quot;my electronics are going to try and pull through around 600W and 50A at +12V DC so&quot;<br />
<br />
you said the power supply could yield<br />
&quot;if I took all the power cables from the +12v DC output I would get 780W at 65A MAX.&quot;<br />
<br />
so<b><u> IF</u></b> your last statement is correct you are good to go.
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<div>
and for sure -NEVER connect 5, 12 and 3.3V lines together<br />
<br />
if you need more power, just use 2 separate power units of say 600 W<br />
but what VOLTAGE does your project need???
</div>


<div>
any comments, peggiegreg, or questions?
</div>


<div>
The Unit is : Aerocool Integrator 850 W Power Supply Unit - Black<br />
The Specs are on the back and all through I agree the watts don't add up to 850, I only wrote what was on the back!<br />
<br />
the only device being plugged in at the moment is a 12v DC amp. this will draw a lot of current/amps.
</div>


<div>
Spec says single rail 12V so it doesn't matter which 12V output wires you connect together since they're all connected together internally. I would suspect that anything you take out of the 5V or 3.3V would reduce what's available from the 12V rail.
</div>


AeroCool-Integrator-850W_Specs.jpg

<div>
and as i said before - you can connect 2 PSU's if one is not sufficient
</div>


<div>
Guys, this is really really helpful! my only remaining question is, what cables are the 12v coming from 1 rail? I am assuming all on the larger connector but I cant see where it is specified...
</div>


<div>
you can use the black and Yellow wires for 12 V connectors - &nbsp;also available on the molex (4-pin &nbsp;connectors
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<div>
black and yellow are 12v? I thought usually red was 12v, black was grounding cable? or at least that's how I was going to attempt to wire it up!
</div>


<div>
so to be clear &nbsp;-BETWEEN Yellow and black you have 12 V<br />
the + side is on the Yellow cable,<br />
<br />
you never answered my question though : what voltage does your project need ???
</div>


<div>
I need 12v, so if I took all the yellow wires from all the connectors I would get a combined output of 12v. the red as shown by @dbrunton is 5v so therefore I wont touch the red cables.<br />
<br />
once completed I will post a picture up of it wired and working for anyone who is interested! then I will close the question :)
</div>


<div>
and as i said - if that does not supply enough current, use a 2nd PSU
</div>


<div>
And by the way, using a 2nd power supply is not so easy.<br />
There is no problem to connect in series 2 switchable power supply and use maxim current equal with minimum current from those 2, of course the voltages will sum.<br />
But when comes to increasing the current by putting in parallel 2 outputs from 2 power supplies, then you cannot do it just like that. There are some rules that you must respect.<br />
Even if the power supplies are identical, with the same output current and obviously the same output voltage, which is recommended, you cannot just connect them in parallel.<br />
They must have the current sharing function.<br />
And if not?<br />
Then you must use at least 1 high-power diode on each + output.<br />
This solution is more for redundant applications, but may work also for current increase with downside that you lose efficiency. Will be significant power on those diodes at high currents and maybe you need to install heat sinks.<br />
Why do you need diodes? For small currents also resistors may be used, but is not your case.<br />
You need diodes to prevent one power supply to become load and the other source.<br />
Your power supplies, even the same type, model, manufacturer, have tolerances specified in their datasheet. And those tolerances make the differences in current and voltage at the output. One will sink and one will source. In time that will lead to the failure of one of the power supplies.<br />
So, it is not as easy as it looks, juts to connect some wires together.
</div>


<div>
viki- i have often connected power devices by means of a 2nd PSU to a pc - no problem
</div>


<div>
Then you did not do it proper.<br />
For your own test/use, in the lab, just to play &nbsp;home in garage, you may use it for a while, but will drastically reduce the lifetime of at least one power supply in long time use, especially high currents. I totally doubt that such kind of system used at 80% rated load will reach the lifetime or warranty time specified by the manufacturer. <br />
And never do that by selling a system with 2 such power supplies with output in parallel to a customer.
</div>


<div>
I do not understand why the people do not think or try first to contact official the manufacturer of the product. Maybe they are just not use to do it.<br />
<br />
So peggiegreg, in your place I would call or write an email to sales@aerocool.com.tw<br />
<a href="http://www.aerocool.com.tw/index.php/contact" rel="ugc">http://www.aerocool.com.tw/index.php/contact</a><br />
<br />
and I would ask nice the technical support for 3 things:<br />
- The datasheet with specs + user manual for “Aerocool Integrator 850w 80+ Power Supply”.<br />
- What is the maximum current on +12VDC output on each pin from each connector?<br />
- Can you connect in parallel all +12VDC voltages from all connectors? If not from all, then from which?
</div>


<div>
I contacted Aerocall and got the following response:<br />
<br />
<i>Hello,<br />
<br />
I have been passed your e-mail to Aerocool, as we are a UK distributor.<br />
<br />
&nbsp;Looking at the output label on the actual PSU, the maximum current output on the +12V rail (DC) is 65A. &nbsp;So in total the PSU should output 65A on this rail. &nbsp;This includes:<br />
<br />
The Motherboard (Via ATX Connector and 4+4Pin Connector)<br />
<br />
PCI-E Devices (Via 6+2pin &nbsp;Connectors)<br />
<br />
SATA Devices (Via SATA Connectors)<br />
<br />
Molex Devices (Via Molex Connectors)<br />
<br />
FDD Devices (Via FDD Connector)<br />
<br />
&nbsp;<br />
<br />
It should not matter how the devices are connected as the +12V on all devices is being drawn from the same rail on the PSU. &nbsp;Hope this helps<br />
<br />
Regards<br />
<br />
Tony Cutt<br />
Returns Department Manager<br />
A One Distribution (UK) Ltd</i><br />
<br />
not taken it apart yet but I am going to this week for sure and then i will test and upload my video for it :)
</div>


<div>
Re diodes on dual-PSU units. RS do a diode to that spec IDAV 65A, Vf = 0.67 V . 0.67v drop at 65A = 43 Watts wasted power from one diode, how many do you want in it and how's the mobo going to cope with 0.67V less than it's expecting on the 12V rail?<br />
<br />
Take a look at <a href="http://www.ebay.com/itm/HP-491836-001-467999-001-power-supply-backplane-for-hp-eh983a-d2d4312-dl370-G6-/151764265565" rel="ugc">http://www.ebay.com/itm/HP-491836-001-467999-001-power-supply-backplane-for-hp-eh983a-d2d4312-dl370-G6-/151764265565</a>, that's the HP module that takes 2 * 12V 1000W PSUs as input and provides redundant power on ATX-type connectors as output. No hulking great heatsinks in it, certainly nothing that could dissipate 43W.
</div>


<div>
But this PSU is not for a mobo, it is for an audio amplifier.
</div>


<div>
Same principal applies whether it is a mobo or an amplifier, it's expecting 12V, not 12V - the diode's Vf.
</div>


<div>
An audio amplifier is not a digital circuit, but rather analog.<br />
Even digital circuits accept tolerances for &quot;0&quot; and &quot;1&quot; logic.<br />
So, an analog audio amplifier will not suffer when is supplied &nbsp;with 0.65VDC less. Even more, there are Schottky diodes with low drop voltage down to 0.3-0.4VDC<br />
<a href="http://www.st.com/st-web-ui/static/active/en/resource/technical/document/application_note/CD00003953.pdf" rel="ugc">http://www.st.com/st-web-ui/static/active/en/resource/technical/document/application_note/CD00003953.pdf</a><br />
<a href="http://www.ixys.com/documents/appnotes/ixan0042.pdf" rel="ugc">http://www.ixys.com/documents/appnotes/ixan0042.pdf</a><br />
<br />
<a href="http://eu.mouser.com/Semiconductors/Discrete-Semiconductors/Diodes-Rectifiers/Schottky-Diodes-Rectifiers/_/N-ax1mj?P=1yuo595Z1yuo85yZ1yuobktZ1yuo9ucZ1yuobgy&Rl=ax1mjZgjdhq5Z1yuoc6sZ1yuo9zuSGT" rel="ugc">http://eu.mouser.com/Semiconductors/Discrete-Semiconductors/Diodes-Rectifiers/Schottky-Diodes-Rectifiers/_/N-ax1mj?P=1yuo595Z1yuo85yZ1yuobktZ1yuo9ucZ1yuobgy&Rl=ax1mjZgjdhq5Z1yuoc6sZ1yuo9zuSGT</a>
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<div>
The highest amperage of those is 35A, not enough for the application. Anyway they don't use hulking great diodes, they just connect the rails together and hope that if a PSU fails it doesn't short-circuit the output. Take a look at 399429-001 from an HP DL380 G5, do you see any power components on it?
</div>


<div>
We discussed above only in principle. And one diode 35A for one output/wire would have been enough, actually even less looking at the diameter of the wires. Not to mention that are higher current diodes than 35A mentioned above.<br />
He does not need the diodes, because the manufacturer answered that he can connect all the +12VDC outputs in parallel because they are connected to the same inside rail.<br />

<blockquote>
It should not matter how the devices are connected as the +12V on all devices is being drawn from the same rail on the PSU.
</blockquote>
</div>


<div>
Weren't we talking about using two PSUs in parallel?
</div>


<div>
<div class="content wysiwyg-content">
Hi Experts,<br />
<br />
I am looking for someone who is good with electronics, watts, amps etc.<br />
I am connecting a PSU 850w to some electronics for a project (not PC based).<br />
the PSU is a standard PC PSU for a ATX board.<br />
<br />
this is my question:<br />
<br />
if I took all the power cables from the +12v DC output I would get 780W at 65A MAX.<br />
if I took all the power cables from all the outputs, this includes any other rails. so lets say the +5v 20A 150W and the +3.3V 24A 150W were also attached to my electronics. what would the outcome be? more power, more amps, more wats? or if by adding the lower amount in do I actually decrease the power? amps? watts?<br />
<br />
I think I am making things clear.<br />
<br />
my electronics are going to try and pull through around 600W and 50A at +12V DC so I want to know if my best bet is to attach all the Red cables coming out for power or attach only the red cables coming from the 1 rail +12V 65A 780W.<br />
<br />
hopefully someone here can help!<br />
<br />
additional info: the electronics being plugged into it will be speakers and an amp. I had the system setup and working with a 300W psu at 20A but the whole thing popped after using it for 10 mins. could not cope with that much power trying to be pulled through it. so obviously whatever way I decide to connect the new one up, I need to make sure im getting the most current, most cables, most everything to my Amplifier!
</div>
</div>


Hi Experts,

I am looking for someone who is good with electronics, watts, amps etc.
I am connecting a PSU 850w to some electronics for a project (not PC based).
the PSU is a standard PC PSU for a ATX board.

this is my question:

if I took all the power cables from the +12v DC output I would get 780W at 65A MAX.
if I took all the power cables from all the outputs, this includes any other rails. so lets say the +5v 20A 150W and the +3.3V 24A 150W were also attached to my electronics. what would the outcome be? more power, more amps, more wats? or if by adding the lower amount in do I actually decrease the power? amps? watts?

I think I am making things clear.

my electronics are going to try and pull through around 600W and 50A at +12V DC so I want to know if my best bet is to attach all the Red cables coming out for power or attach only the red cables coming from the 1 rail +12V 65A 780W.

hopefully someone here can help!

additional info: the electronics being plugged into it will be speakers and an amp. I had the system setup and working with a 300W psu at 20A but the whole thing popped after using it for 10 mins. could not cope with that much power trying to be pulled through it. so obviously whatever way I decide to connect the new one up, I need to make sure im getting the most current, most cables, most everything to my Amplifier!

PSU Amp/Watts Power Output.

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