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Looking for help on a 0db TEC water-cooled rig - Page 2

post #11 of 34
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Thanks for replying xtremetechuk- the Phobya 1080's have fans and would be too noisy. I don't think the radiators alone would be enough to cool passively unless in a very cold room.

I want to use a combination of passive radiators and TEC's to get the water down to a reasonable level. Unlike many TEC users, I have no intention of getting the water below room temperature.

In a 25 degree room (mid 70's F), the water temperature for loop I'm thinking might run at something like:

Water into pump @ 35 degrees -> water into GPU warms to 40 degrees -> water into passive radiator cools to 39 degrees -> water through 3x TEC's cools to 36 degrees -> water through cpu heats to 39 degrees -> water through passive radiator cools to 38 degrees -> water through 3x TEC's cools to 34 degrees -> water across NB and ram warms to 35 degrees -> water into pump @ 35 degrees.

This would hopefully leave the gpu and cpu in the mid 50's C at most.

The problem is, I don't know how to build controllers that regulate when the TEC's turn on and off. I don't want the water getting too cold when the system is idle and find it ruined due to condensation.
Edited by avaya - 8/12/11 at 8:35am
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post #12 of 34
Quote:
Originally Posted by avaya View Post
Thanks for replying xtremetechuk- the Phobya 1080's have fans and would be too noisy. I don't think the radiators alone would be enough to cool passively unless in a very cold room.

I want to use a combination of passive radiators and TEC's to get the water down to a reasonable level. Unlike many TEC users, I have no intention of getting the water below room temperature.

In a 25 degree room (mid 70's F), the water temperature for loop I'm thinking might run at something like:

Water into pump @ 35 degrees -> water into GPU warms to 40 degrees -> water into passive radiator cools to 39 degrees -> water through 3x TEC's cools to 36 degrees -> water through cpu heats to 39 degrees -> water through passive radiator cools to 38 degrees -> water through 3x TEC's cools to 34 degrees -> water across NB and ram warms to 35 degrees -> water into pump @ 35 degrees.

This would hopefully leave the gpu and cpu in the mid 50's C at most.

The problem is, I don't know how to build controllers that regulate when the TEC's turn on and off. I don't want the water getting too cold when the system is idle and find it ruined due to condensation.
It doesn't actually work like that.. You generally don't see more than 1ºc through out the whole water loop. The water warms up slowly through the whole loop.
Edited by Mindchi|l - 8/12/11 at 10:37am
post #13 of 34
http://ncix.com/products/?sku=51284&...actal%20Design

These fans are rated at 9DB, you can order them on their US site (ncixus.com) and if you put them on a single 560 radiator you will be fine (even a 420 would probably do) than use an external sound proofed case (put 2 layer of wood with air in between and lots of foam). You could also get a Rad box from danger den and put the rads outside the room. Koolance also makes some all-in-one external radiators with a pump/reservoir/radiator/fans so all you have to do is put it outside the room and you're fine.

http://www.koolance.com/water-coolin...roduct_id=1173

You could also submerge it in mineral oil. It would be 100% silent since the fans are submerged but it's not good for 24/7 unless you have a VERY large aquarium and lots of fans in it to make some flow.
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post #14 of 34
So you want to watercool the CPU, RAM, NB, and GPU?

Mindchill is quite right, the loop will eventually reach equilibrium and temperatures will stay the same regardless of sequence. You should also note that TECs produce substantial amount of heat, even when undervolted.

The TECs hotside will need to be watercooled, and because your only interested in above ambient temperatures, I would personally use the additional radiators on standard watercooling loop rather than the TECs. TECs are only really used for sub-ambient coolant temperatures, using them for above ambient coolant temperatures would be pointless and wasting electricity.

If two Phobya 1080 radiators can't sufficiently cool the load without TECs, then how do you expect to sufficiently cool the current heatload plus the additional heatload from the TECs?

The TECs heat wont magically vanish, unfortunately. frown.gif

You could route the watercooling system from another room, that seems to be the only viable option for under 10db.

I think two Phobya 1080 radiators passive may be sufficient for the computers heatload only. We are talking the equivalent of six 120.3 radiators. biggrin.gif

I would like to know what mindchill thinks regarding the radiator.
post #15 of 34
Considering 10dB is basically the volume of a a person breathing there's no way to accomplish this realistically in any room you have miked. The heat load is just to much for any fan to run that quietly and what is more any pump you use is going to be loader than 10dB. Hell even the water moving through the res will sound roughly like rustling leaves which is louder than 10dB. If you really want to do this the only way I see you getting it accomplished considering the loop length and the amount of cooling (as normal rads by the time you add enough of them will be more restrictive than you'd like slowing flow to a crawl) is to cool it externally as well as power it all the same. I suggest you build a small battery (probably 3) of bong coolers outside. Here's a link to what I am talking about. 3 Should keep things quiet at a low enough fluid velocity to achieve your goal.

Link: http://www.overclock.net/cooling-exp...k-warning.html
Link: http://www.overclock.net/cooling-exp...6k-denied.html

Best part is it's relatively cheap to build and if done right should keep temps ~4 degrees below ambient.
    
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post #16 of 34
If you dead set on using tecs as a chiller, you could take some 2" x 2" square aluminum (or even better copper if you can afford it) 6' in length, and bury 2/3 of it into the ground, and then use that as your heatsink for the hotside of the tecs, then you could possibly eliminate all the radiators and use just the tecs to cool the loop.

If your studio is built in a basement or you have a slab foundation, this would be pretty simple to a accomplish.
post #17 of 34
Quote:
Originally Posted by Elloquin View Post
Considering 10dB is basically the volume of a a person breathing there's no way to accomplish this realistically in any room you have miked. The heat load is just to much for any fan to run that quietly and what is more any pump you use is going to be loader than 10dB. Hell even the water moving through the res will sound roughly like rustling leaves which is louder than 10dB.
This is pretty much what I have been thinking through this whole thread lol

Not to mention HDD spinning, so you'll need either SSD or serious dampening on those, then you might get capacitor whining...

The easiest solution is just to not have the computer in the room. It's phenomenally easy to just route wires to an adjacent room for the screen and interface.

Aside from that, the only way I can think of of making a completely silent computer, is liquid submersion in mineral oil.
    
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post #18 of 34
10dB is quieter than ambient will be inside your studio - it ain't a realistic target. Your pump even baffled will make more noise than that anyway.

Why not just put the computer next door?
post #19 of 34
I'm not going to insult the guys intelligence by claiming the guy can't build a computer to run under 9db, and frankly thats not the point of the thread.

The point was to cool a computer with tecs because tecs are silent. The short answer is yes with big enough heat sinks on the tecs themselves, he could cool his computer with tec's alone and without radiators.
post #20 of 34
Quote:
Originally Posted by Mïndçhì|l View Post
I'm not going to insult the guys intelligence by claiming the guy can't build a computer to run under 9db, and frankly thats not the point of the thread.

The point was to cool a computer with tecs because tecs are silent. The short answer is yes with big enough heat sinks on the tecs themselves, he could cool his computer with tec's alone and without radiators.
well it kinda is - he's trying to do something impossible.

He can cool a loop with TECs, but it won't be silent because the pump will still make more than 9dB noise. Heck the PSUs required to pump the power into the amount of TECs required will make more than 10dB, as there's no way they'll be fanless...
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