2 PSUs or 1 big one to power gaming system and 450 watts of fans?

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chaosgs

chaosgs

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Bought a core X9 case and got a fantastic deal on Delta 240 CFM fans. Its about 450 watts of fans.

The EVGA 1300 PSU is $175 1600 is $300. I'd rather just get a 750 watt PSU for cheap for the fans. Any experience using just a PSU for fans? Or known downsides?

BTW the gaming system will be a new kaby lake or zen with CF or trifire 290s but want to buy the PSU now to power the old system and fans. The EVGA 1300 is a no Brainer for me at the price. But PSU calculator says I need 1300 watts for my OC and 24/7 usage.

BTW the Delta fans were $12 each. Thought it was a good idea at first until I seen they were 30 watts each!! So for the price I'll have 2400 CFMs (more air movement than a car radiator) through the case and 2 fans for noctuaua D15 and another 2 to hit the mobo inside the case.
 
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Slumy__57
Yeah, we're just messing with you, in all seriousness though, your build is way overkill, there is absolutely no need for the level of cooling you seek to achieve, HOWEVER, not our decision, and if you want the capability to blow your own roof off, all the power to you. I personally think it's kind of an awesome idea, overkill, but kind of awesome.

I think Rouge Leader's last comment put it best, a single, capable, high quality PSU would do you best, as a crappy second PSU has potential to blow out your entire cooling system. However, I also stand by what I said earlier, and you could theoretically use a second PSU to power the fans if you really wanted to.

Does that answer your question?

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chaosgs

chaosgs

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Delta AFB1212GHE 240 CFM at 30 watts each.

Wasn't a need. Was a good deal at first. Btw I have 4 140 CFM deltas already which are loud but so worth it. Great cooling and out lasted the noctua fans of 4 years that costed much much more money.
 
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DSzymborski

DSzymborski

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But where are you getting the 450 for fans? I can't imagine you're running 15 fans.
 
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Rogue Leader

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Dude he is using 240 cfm server fans, normal fans push like 30-70 cfm. Its going to sound like an F-16, and yes they can draw that much power.



These are gonna sound way louder, like drown out your speakers louder. You really do not need that much cooling unless you were overclocking to the moon. There is no efficiency to that setup at all.

Personally I would run only 1 PSU, 2 is a really hinkey setup having a PSU sitting outside like that and all that extra wiring is not a good idea. And 450 watts? How? are you running 15 of them???

However personally I would toss all that stuff in the trash and use some normal fans, you are wasting money on this.
 
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Slumy__57

Slumy__57

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Lol, you'll probably be able to cool the room with this. In regards to your question, I don't see why you couldn't run a separate PSU for just your case fans. Obviously you'll have the problem of cable management, and finding a good place for a second PSU, but I've run case fans off of a separate power supply before just for fun and I never had a problem. One thing you'll want to keep in mind, is you'll either have to use a paperclip or a PSU tester to power it on, since it won't be connected to your MOBO and won't have anything telling it to turn on.
 
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Faux_Grey

Faux_Grey

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"Noise Level 62 dBA"

Can I ask why you want these fans?
Just making sure you know that these are going to make a HUGE amount of noise.

When I say HUGE I mean, unbearable.
If your PC is within 5-10 meters of you through hallways you're going to hear it quite clearly with these fans.
 
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chaosgs

chaosgs

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Ok. I am hooking up the fans to a powerful fan controller. I game with noise cancelling headphones. I'm not worried about noise. I need a 8 pin and 2 4 molex connectors to power the fan controller.

The core X9 can house 2 PSUS by design.
 
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DSzymborski

DSzymborski

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Hallways? If he's got 450W of these things strung up somehow, they'll be hearing it in a different *year*.

For the OP, this is a serious case of overbuilding. 450W of fans, you've far outraced any actual marginal cooling improvements, this is a whole lot of futzing and jury-rigging for returns approaching zero.
 
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Faux_Grey

Faux_Grey

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Hahaha!
I remember bringing a server home from work once, fans were rated at 58DB, what a nightmare that was.

450w of fans, we're talking 15x fans here, even servers don't have that many.


@OP, good luck to your noise cancelling headphones. :D
 
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DSzymborski

DSzymborski

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In fairness, this looks like it would be fun to do in your home office.
 
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Rogue Leader

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I would still use a single larger PSU vs buying a "cheap" 750w. Especially running fans, if the PSU is bad or one shorts out it can do some damage to all of them.

While this idea is ridiculous, if you're going to do it at least do it right.

Make sure to inform your neighbors as well, so they don't think that a plane is landing in the yard.
 
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Slumy__57

Slumy__57

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Lol, and comment of the year goes to...
 
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Slumy__57

Slumy__57

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Yeah, we're just messing with you, in all seriousness though, your build is way overkill, there is absolutely no need for the level of cooling you seek to achieve, HOWEVER, not our decision, and if you want the capability to blow your own roof off, all the power to you. I personally think it's kind of an awesome idea, overkill, but kind of awesome.

I think Rouge Leader's last comment put it best, a single, capable, high quality PSU would do you best, as a crappy second PSU has potential to blow out your entire cooling system. However, I also stand by what I said earlier, and you could theoretically use a second PSU to power the fans if you really wanted to.

Does that answer your question?

 
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Solution
geofelt

geofelt

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Your difficulty in using a second psu is how to get it started.
A psu normally starts by sensing the motherboard startup.
There are adapters that are like a y connector to the main power to get around this issue.
One big psu seems simpler. It also avoids the issue of where to mount the psu since most cases have only one psu location.

This is,, of course not a real practical thing to do, but why not if it rings your bell.
 
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Slumy__57

Slumy__57

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No need to regret your decision, buying a couple of extra $12 fans isn't exactly a big deal in the grand scheme of things. I've honestly thought of doing something similar with a 650 watt power supply I've got sitting around just for kicks. It's not at all necessary to have that kind of cooling power, but hey, for $12 a fan, why not?
 
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DSzymborski

DSzymborski

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Still doesn't actually make any sense - the fan controller itself uses just about nothing. To be perfectly honest, I don't think you quite get what your actual needs and benefits are in this situation. You need to step back, take a breath, and make a realistic evaluation of your cooling needs and your power needs to meet your build are.
 
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