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Just bought these from a fellow OCN'er..... - Page 3

post #21 of 29
Quote:
Originally Posted by Donkey1514 View Post

At first I wanted to stay barely above ambient but now I'm thinking as cold as 3x boreas will take me tongue.gif

Awaiting a few more parts to start my build wheee.gif

I am not familiar with boreas. What kind of cooling power/TEC capacity they have?
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post #22 of 29
Thread Starter 
The boreas that I purchased haven't arrived yet and are modified, so I won't know any specifics until I tear them apart.

The only info the seller knew is that they draw about 150w per borea

Found this but I don't know how modified the one's I purchased are-
Boreas Spec's
Edited by Donkey1514 - 7/5/13 at 11:10pm
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post #23 of 29
Quote:
Originally Posted by Donkey1514 View Post

The boreas that I purchased haven't arrived yet and are modified, so I won't know any specifics until I tear them apart.

The only info the seller knew is that they draw about 150w per borea

Found this but I don't know how modified the one's I purchased are-
Boreas Spec's

If it is designed properly (I guess CoolIt did), I estimate 3 x150W power draw should provide over 200W cooling power at delta T (water/air) of -15C, if the air cooler works well. That should be more than enough to cool a 1.4V 5GHz haswell. Can't wait to see you results:)
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post #24 of 29
Thread Starter 
Quote:
Originally Posted by foxrena View Post

If it is designed properly (I guess CoolIt did), I estimate 3 x150W power draw should provide over 200W cooling power at delta T (water/air) of -15C, if the air cooler works well. That should be more than enough to cool a 1.4V 5GHz haswell. Can't wait to see you results:)

Could I reach lower temps more efficiently by using different tec's on a single borea vs running 3 borea coolers with the 12x original tec's? Just a thought tongue.gif
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post #25 of 29
Quote:
Originally Posted by Donkey1514 View Post

Could I reach lower temps more efficiently by using different tec's on a single borea vs running 3 borea coolers with the 12x original tec's? Just a thought tongue.gif


Why not both?
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post #26 of 29
Quote:
Originally Posted by Donkey1514 View Post

Could I reach lower temps more efficiently by using different tec's on a single borea vs running 3 borea coolers with the 12x original tec's? Just a thought tongue.gif

The answer is complex. In short it's no.

To get better results you should use 3 and only replace the TECs with SLIGHTLY higher (<50%) Qmax ones. Be careful when increasing TEC power because the hot side air cooling efficiency (C/W) is not that great so the higher power will saturate it at some point and then you will actually get worse cold side temp. If cool-it engineers are clever the default TECs should be already pushing the air cooler close to its limit and leaving little headroom for upgrade.

If you choose to run different TECs in the same loop, to make sure each TEC is contributing, you can measure each type of TEC's no-load cold side temps at the voltage you are running (or look at the datasheet if available) . Then as long as the cold loop temp is higher than those measured temps, every TEC is contributing. Power efficiency is another story.biggrin.gif

Sorry I am a technical guy and not very good at explaining wink.gif
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post #27 of 29
Thread Starter 
Quote:
Originally Posted by foxrena View Post

The answer is complex. In short it's no.

To get better results you should use 3 and only replace the TECs with SLIGHTLY higher (<50%) Qmax ones. Be careful when increasing TEC power because the hot side air cooling efficiency (C/W) is not that great so the higher power will saturate it at some point and then you will actually get worse cold side temp. If cool-it engineers are clever the default TECs should be already pushing the air cooler close to its limit and leaving little headroom for upgrade.

Well from what I can see in the pics of the units I bought, the original owner added blocks to the hot side making the air cooling aspect pointless. I haven't figured out if I'm going to remove the hot side block and return it to air cooled or use the blocks and run a separate loop....

single block using air cooling on the hot side (original design)


dual block using another block on the hot side (modified design)
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post #28 of 29

Just buy a bunch of 60W Peltiers off of ebay for $3 a piece and replace the 12W ones with them :p

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post #29 of 29
To answer you question about how cool a single Boreas Chiller can get your CPU, I have a Boreas case (up for sale BTW) and I cooled my CPU down to 8-10 C and you can go colder than that especially with (3) of them. You will have to watch for condensation when going that cold though. Just thought I give some insight on the subject since I've used one since 2008 when I purchased mine new from Coolit Systems. I generally ran my around 26C and never had any issues with it. Did you get the MTEC controllers with those units?

You can see pictures of my setup here: http://s1199.photobucket.com/user/DJMikeT/library/Boreas%20Case
Edited by DJMikeT - 8/9/13 at 9:16am
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