Fanless Watercooled PC?

[Izaya Orihara]

_{Hey guys in one of his videos Jayztwocents said that if he turns off all the fans in his pc (7x 120mm rad, 3770k and 780) he gets only about 10 degrees highe temps. Can that be true? I want to build a watercold pc and i'm looking at a 360mm,280mm and 240mm for a 4930k (migth wait for the 5930k) and dual Titan blacks (i need the vram since 4k...) could that work for me? So that the only thing that makes noise in the pc is the pump?} 

[Cwazywazy]

It can work without the fans but the temperature will keep climbing because the heat will build up in the radiators with nowhere to go until it eventually overheats.

 

Just get some quiet fans and run them at low speed.

[Adnanklink]

yep, those temps wont last very long. Even at cpu idle, temps will keep climbing as the air in the radiator will also heat up to the point where heat will no longer transfer out of the rad.

[Artem]

It can work without the fans but the temperature will keep climbing because the heat will build up in the radiators with nowhere to go until it eventually overheats.

 

Just get some quiet fans and run them at low speed.

This is not true, with enough rad space, the rads can dissipate the heat to the surrounding air as long as your ambient temps aren't too high.

[lufihengr]

Normal rads won't do the trick. There is some purpose built passive cooled rads, but they are huge. Normal rads would work I guess at idle, but not when you are gaming. Run some fans at 5 volts if you can get some that run that slow.

[Izaya Orihara]

Normal rads won't do the trick. There is some purpose built passive cooled rads, but they are huge. Normal rads would work I guess at idle, but not when you are gaming. Run some fans at 5 volts if you can get some that run that slow.

I just asked him and he is using totally normal rads. (low fpi ones. 8fpi) And it seems to work. Around 50 degress while stressing. (ambient 23) 

[Hoppa]

1. 4930k just came out so 5930k won't exist for 2 years

2. rads need static pressure so (i think) it will just get hotter -> it's different from a heatsink.

3. you will need some fans

4. if you live in a 0 degrees c environment than that will help.

5. to achieve 0 fans and dead silence, you will need massive heatsinks on gpus (unless low end gpu) and cpus

6. I remember linus doing a video where there was 0 fans (sort of old)

[Artem]

Trust me, it will work. Don't listen to people that haven't tried it. My 3770k at 4.8 runs at 55 celsius while gaming and around 78-80 fanless while gaming being cooled by a 320mm ut60.

[lufihengr]

I just asked him and he is using totally normal rads. (low fpi ones. 8fpi) And it seems to work. Around 50 degress while stressing. (ambient 23) 

But he has a 3770K and 780.... You are planning of almost doubling the heat output. 

[Str_Mape]

2. rads need static pressure so (i think) it will just get hotter -> it's different from a heatsink.

 

Heat sinks also benefit from static pressure, Radiators are effectively heat sinks but the heat is being transferred to them via the liquid not from direct contact allowing them to be bigger / have more.

[Imabigmac]

I just asked him and he is using totally normal rads. (low fpi ones. 8fpi) And it seems to work. Around 50 degress while stressing. (ambient 23)

well is he running any fans at all? I have to call BS if there is not a single fan running.

[Izaya Orihara]

But he has a 3770K and 780.... You are planning of almost doubling the heat output. 

Hmm i think will grab some fans. Stress the pc with them spinning. Then without them spinning and then i will decide. 

[lufihengr]

Hmm i think will grab some fans. Stress the pc with them spinning. Then without them spinning and then i will decide. 

That sounds like a good plan.

[Izaya Orihara]

well is he running any fans at all? I have to call BS if there is not a single fan running.

No no fan at all. (He usually doesn't do that. He just said it on a quick side note. http://youtu.be/gohE6cytlFU?t=45s

[ForsakenLive]

1. 4930k just came out so 5930k won't exist for 2 years

 

Haswell-e was already confirmed for Q3 2014. Every year a new iteration comes, and for the LGA 2011, the architecture is always one behind. Broadwell should be here at Q4.

 

Regarding the post, yes this is possible, we even have build logs showing this on the forum. But it's always people the has big low FPI rads (there is an insane 2x 480mm rads build, without the fans). However most of these builds have 1-2 quiet case fans, creating air pressure. They are not in the rad, so there is much less noise.

[Imabigmac]

No no fan at all. (He usually doesn't do that. He just said it on a quick side note. http://youtu.be/gohE6cytlFU?t=45s

when I'm beside my pc and my 280mm rad I'll turn all my fans off and when I burn the cpu out ill post on here.

[Izaya Orihara]

when I'm beside my pc and my 280mm rad I'll turn all my fans off and when I burn the cpu out ill post on here.

An AIO or a serious rad? 

[Hoppa]

Heat sinks also benefit from static pressure, Radiators are effectively heat sinks but the heat is being transferred to them via the liquid not from direct contact allowing them to be bigger / have more.

yeah i know that

But heatsinks do a better job (and cheaper) when there's no static pressure applied making them a better option when going passive cooling.

This is because heatsinks don't have to be confined into a small block like a radiator, there's a lot more space for more fins.

[Imabigmac]

An AIO or a serious rad?

it's an aio, same thing just has my stock 3570k on it.

[EpicGeekonFire]

I wouldnt let the CPU overheat because of the lack of fans. Just get some quiet fans and deal with the slight noise

[Hoppa]

Haswell-e was already confirmed for Q3 2014. Every year a new iteration comes, and for the LGA 2011, the architecture is always one behind. Broadwell should be here at Q4.

oh really, that's awesome.

I heard that 2011 socket is done, so broadwell should be a different socket, shouldn't it?

[Izaya Orihara]

oh really, that's awesome.

I heard that 2011 socket is done, so broadwell should be a different socket, shouldn't it?

Haswell E will be on the X99 chipset and Broadwell will be on the 1150 socket but with a 14nm CPU. 

[warmmilk]

fans aren't the issue.  you can get quiet good SP fans and run them really slow 6-700 rpm, you won't be able to hear them unless your ear is right on it.  the problem is the pump.  I have a D5 vario on the slowest speed, and its the loudest thing in my system.  just get some noiseblockers or noctua's and turn the really slow and fan noise won't be an issue.

[Cwazywazy]

Tell your friend to run Prime95 for 5 hours then check the temps.

[Ghost]

I personally don't have my rad fans on at idle. I have a 3*3 external rad and the water out of the case is 25C. The water in is at 24C at idle.

 

During load (when the water temp goes up) 3 of the fans on the radiator spin up to 1000RPM, it's still inaudible.

 

(I'm cooling a 7970@1.2GHz and 3570k@4.6Ghz)

 

I have my case fans on at 900RPM just to keep airflow through the case for passively cooled components. But you can't hear them.