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post #6761 of 10609
Thread Starter 
Quote:
Originally Posted by Mads1 View Post

Quote:
Originally Posted by Mega Man View Post

No the Swiftech needs to be plugged into a sata power source,

Oh ok, is there one that dont. smile.gif


Not really,

That's what PWM is really all about . . .

Supply a full 12V to the device, either fan or pump, and then the PWM signal instructs the device to chop the full 12V supply into short bursts so that you can get a reduced speed without reducing the torque so much as with variable voltage control.

Having the splitter with a single 12V connection to the PSU, which it then distributes to the normal power pins of each fan headers, simplifies the wiring greatly, and means much less power has to go thru the main circuit board of the Aquaero.

Darlene
post #6762 of 10609
Quote:
Originally Posted by IT Diva View Post

Supply a full 12V to the device, either fan or pump, and then the PWM signal instructs the device to chop the full 12V supply into short bursts so that you can get a reduced speed without reducing the torque so much as with variable voltage control.

Having the splitter with a single 12V connection to the PSU, which it then distributes to the normal power pins of each fan headers, simplifies the wiring greatly, and means much less power has to go thru the main circuit board of the Aquaero.

Darlene

I may have asked this question before ... but how many fans can a 12V connection power? I think the answer I previously got was something like 'lots'.
post #6763 of 10609
it depends on the amp rating of the fan i wanna say 7.5a ( but i could be wrong on this as i am going from memory ) for sata and 10a for fat 4 pin
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post #6764 of 10609
Quote:
Originally Posted by Mega Man View Post

it depends on the amp rating of the fan i wanna say 7.5a ( but i could be wrong on this as i am going from memory ) for sata and 10a for fat 4 pin

I've ordered 14 QF120 Cryorig Balanced fans. I can't see an amp rating on their web site but one of the reviews (thermalbench) contains the following passage ...
Quote:
Originally Posted by Thermal Bench QF120 Review View Post

There’s no real info on the back of the hub here. I am used to seeing model numbers, manufacture date, fan name, current draw rating, power draw rating or any combination of these. But aside from the max advertised RPM and the company name, there’s nothing else here. The product box has a 2014 date on it but that may be just for the packaging itself. The thing that I am missing most though is the power rating. I would really encourage Cryorig to publish max start up current/power draw and max operating current/power draw. While I can’t measure the start up current itself, I did measure a max operating current draw of 0.263 A on average across these fans. This corresponds to ~3.2 W each on the 12 V rail. Given that most modern motherboards have standard 1 A fan headers and can accommodate a decent level of start up boost, you should be able to power 3 of these off a single header- in theory anyway. Alternatively, you can also power them from provided Molex adapter or use a powered PWM splitter. If using this as a case fan or as a heatsink fan where having 1-2 fans together is the norm rather than the exception, then you should be good with a standard motherboard PWM header itself.

Excellent - thanks for the info ... if only I knew how many 0.263 A fans a 12V rail could carry. Is there a formula to cover this?
post #6765 of 10609
sure, look at your psu to see the size of your 12v rail,

i would worry more about the amp rating of whatever they are plugged in to - going from memory ( which again may be wrong ) the swiftech splitter is rated for 5a i know fat 4 pin connectors are 10a
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post #6766 of 10609
Quote:
Originally Posted by Mega Man View Post

sure, look at your psu to see the size of your 12v rail.

I haven't settled on a PSU yet. The one I am looking at has ...
Quote:
OUTPUT
+3.3V@25A, +5V@25A, +12V@87A, -12V@0.5A, +5VSB@3A

... so using some of those amps for 14 fans doesn't seem to be a problem.
Quote:
Originally Posted by Mega Man 
i would worry more about the amp rating of whatever they are plugged in to - going from memory ( which again may be wrong ) the swiftech splitter is rated for 5a i know fat 4 pin connectors are 10a

Re the splitter ... I have already purchased two SilverstoneTek (CPF04) 8 PWM fan splitters. It has a capacitor in it that shows the following (16V in case you can't see the image) ...

cpf04-05.jpg

thumb.gifthumb.gifthumb.gif
post #6767 of 10609
Yea you would need to email them
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post #6768 of 10609
Thread Starter 
Quote:
Originally Posted by ruffhi View Post

Quote:
Originally Posted by Mega Man View Post

sure, look at your psu to see the size of your 12v rail.

I haven't settled on a PSU yet. The one I am looking at has ...
Quote:
OUTPUT
+3.3V@25A, +5V@25A, +12V@87A, -12V@0.5A, +5VSB@3A

... so using some of those amps for 14 fans doesn't seem to be a problem.
Quote:
Originally Posted by Mega Man 
i would worry more about the amp rating of whatever they are plugged in to - going from memory ( which again may be wrong ) the swiftech splitter is rated for 5a i know fat 4 pin connectors are 10a

Re the splitter ... I have already purchased two SilverstoneTek (CPF04) 8 PWM fan splitters. It has a capacitor in it that shows the following (16V in case you can't see the image) ...

cpf04-05.jpg

thumb.gifthumb.gifthumb.gif


You'll have no issues running 20 to 25 of those fans from a single Molex or SATA power plug, . . .

The wire gage from the splitter to the plug is more the limiting factor to minimize vdroop, . . . so I'd stay at 20 fans or less, off a single splitter power connection.

If you're using more than 1 splitter so you can have your fans grouped to multiple fan channels on the A6, then that's even better.

Darlene
post #6769 of 10609
Quote:
Originally Posted by Mega Man View Post

Yea you would need to email them
Quote:
Originally Posted by IT Diva View Post

You'll have no issues running 20 to 25 of those fans from a single Molex or SATA power plug

Thanks guys. The plan is ...
  • 6-pin plug from PSU from peripheral SATA
  • molex splitter to feed the two Silverstone fan controller
  • per Silverstone fan controller I will have 6 rad fans + 1 fan (either front fan or rear exhaust) .. so 7 fans per controller
    The silverstone takes a SATA power input ... but I will be swapping that to MOLEX
  • The PWM feed will be from motherboard
    wait ... what am I saying ... this is an Aquaero thread ...
    ... will be from an A6 with each rad having its own channel

It seems I am good to go.
post #6770 of 10609
What benefit is there to buy the aquacomputer d5 with aquabus vs any standard pwm d5? Does it give any info other than RPM that i could get off any d5?
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