View Full Version : What about cooling NB with a T.E.C.???
Hi guys, I have a AB9 pro Motherboard Vmch modded, but I cant reach HIgh FSB's unless I put 1.85v and alot of Ice in my watercooler.
So, I'm thinking about to put a 80W peltier, between my waterblock and my chipset. how cold would it get??? I need temps between 0°C...
would I need a coldplate also???
Tanx and sorry for my bad english!
The gains achieved from using a TEC on your northbridge would be very minimal and the risks associated would be very high. High enough not to justify using a TEC on it.
If you use watercooling, I would suggest the addition of a northbridge block. Although most don't recommend it, in this case I would because of the amount of voltage and head being put through it.
If you use air cooling, I would suggest you move to watercooling :)
Mr. Peanut
03-19-2007, 04:20 PM
The gains achieved from using a TEC on your northbridge would be very minimal and the risks associated would be very high. High enough not to justify using a TEC on it.
If you use watercooling, I would suggest the addition of a northbridge block. Although most don't recommend it, in this case I would because of the amount of voltage and head being put through it.
If you use air cooling, I would suggest you move to watercooling :)I have to agree with Burn. Using a peltier on your chipset would require lots of knowledge if you didn't want to risk ruining something. If you're willing to learn all of the safety procedure associated with TECs, then I would be glad to help you get it done, but to me this simply doesn't seem like a very well-justified project.
serialk11r
03-19-2007, 04:22 PM
NoL is doing it :)
Well....
I gave up the idea of t.e.c. coolin', but I already watercool it...
Burn, why it is no recomended to warercool nb? :S
tanks guys!
Well....
I gave up the idea of t.e.c. coolin', but I already watercool it...
Burn, why it is no recomended to warercool nb? :S
tanks guys!
Why not in a normal application? Because it adds two 90 degree bends, that's why. But when you're pushing 1.70+ vMCH through your northbridge, the heat dump justifies adding a waterblock...In this case.
n00b 0f l337
03-20-2007, 04:08 PM
I use a 70mm now and again. Its 30mm square and perfect.
n00b of l33t:
What about the temps???
Burn:
Well.. My chipset is watercooled now, but I´m not sure about perfect contact... Because I have to set 1.6v for stable 450fsb, and @ aircooler, it was good @ 1.52..... BUT, when I put Ice in the watercooler, I can easyly get 490FSB with 1.8v, Impossible Vmch to aircooler....
Sorry about my enbglish and for being noob!
n00b 0f l337
03-20-2007, 07:42 PM
Dont have it hooked up right now, working on getting a new WB made for it. But due to the low heat output of the 955x chipset it was on, it was around -19C at load, -24C at idle.
80W????
I'm confused! Some people say me to use, and some no to use.... I guess that @ -20ºC I can easily get 533fsb!
If you already know that with a very cold temp you'll get a certain OC, then there's really no question to be asked: Just do it.
This is no longer the hypothetical question of "what +X [MHz] will I get if I TEC the NB?"; instead, it is "I know if I TEC the NB I'll get at least +Y [MHz]."
I say if you want the +Y [MHz], go for it.
EDIT: This is not to say you should be hasty and jump straight in. It is never good to be hasty. Read, ask, and learn.
Thanks l33t, Im sure about the performance gain, bacause the NB under 5ºC water, give me 500mhz, and under 30ºC water, give me only 480, with same voltaage (1.85 (crap board)) So, I think that subzero temps woul give +50mhz
So, another question is: Should I put dielectrical grease under de chipset? (I think there is a little space between the MB and IT)
TopherTony
03-21-2007, 11:32 AM
Anywhere frost can build up, yeah you should insulate. And condensation can occur anywhere there is air. So insulate it somehow
Under the chipset... and if you're TECing already, you should have your board covered with conformal coating or nailpolish.
Foam too to protect the smd's form being craushed or removed!
I'd seal the bord up
Paper gasket
Foam
Grease to seal
Coldplate between the tec and block as tec love presure i hear!!
Mount it and use the 4 mounts, if only two mod it for 4.
thanks for the help guys...
this friday I'll be with tehe pelt... a 80W one!
Will try on the Chipset, with almost no insulation, just for a quick run. If it provides me more 20-30 mhz, I'll insulate properly!
AND, if I like this kand of cooling, I´ll buy a 160W for my cpu too.
Insulate it no matter what or say latters to you mobo
wdrzal
03-28-2007, 01:10 PM
Hi guys, I have a AB9 pro Motherboard Vmch modded, but I cant reach HIgh FSB's unless I put 1.85v and alot of Ice in my watercooler.
So, I'm thinking about to put a 80W peltier, between my waterblock and my chipset. how cold would it get??? I need temps between 0°C...
would I need a coldplate also???
Tanx and sorry for my bad english!
add salt to your ice bath,you'll loose a dozen degrees F or so, table salt ,rock salt it does not matter. Oc will be about -10C or even a little lower. until you figure your next move
That due to the salt making some reaction?
serialk11r
03-28-2007, 02:17 PM
That due to the salt making some reaction?
Salt dissolves in water, changing its properties, so that the water can go below 0C without being ice. Because no energy is needed to make the phase change, temps will keep dropping, until it hits the melting point which is lowered.
Ever dropped some salt on an ice cube? The salt will "eat" right through the ice cube. Also I think salt water has slightly higher thermal conductivity but I'm not sure about that one...
Salt dissolves in water, changing its properties, so that the water can go below 0C without being ice. Because no energy is needed to make the phase change, temps will keep dropping, until it hits the melting point which is lowered.
Ever dropped some salt on an ice cube? The salt will "eat" right through the ice cube. Also I think salt water has slightly higher thermal conductivity but I'm not sure about that one...
You should technically interpret it as solid NaCl changing into its aqueous form instead. Furthermore, it really has nothing to do with "no energy needed to making a phase change" really. Simply, HOH has a different freezing point than does NaCl in the aqueous form. Since has a lower freezing point than the former, the temperature associated with the solid form of HOH at STP will be only liquid, all other things constant.
I´ve already tried the salt+water tip... I got a -11°C ice. this gave some mhz more...
about the insulation: the space between the coldplate and the moterboard, is about 2mm, so I'm planning to insulate it only with dielectrical grease, an amount of it... and some kind of that think that girls put in their nails (don´t know the name in english) OVER THE smd. the rear part winll be insulated with a kind of neoprene...
does anybody have pics of this kinda insulation?
thanks
the NaCl will ionize in the H2O and then basically it will be super conductive. if it leaks gg.. but yea it will go lower without freezing.
might as well put colored gatorade in your tubes :P
Holst
04-02-2007, 09:48 AM
I´ve already tried the salt+water tip... I got a -11°C ice. this gave some mhz more...
about the insulation: the space between the coldplate and the moterboard, is about 2mm, so I'm planning to insulate it only with dielectrical grease, an amount of it... and some kind of that think that girls put in their nails (don´t know the name in english) OVER THE smd. the rear part winll be insulated with a kind of neoprene...
does anybody have pics of this kinda insulation?
thanks
You cant insulate this way using only di-electric grease.
You need to have some closed cell foam or an airgap to stop condensation.
You should also put foam on the back of the board.
I would also be carefull of condensation on the NB block dripping onto your graphics card. Much worse to kill your GPU than motherboard IMO!!
Read the stickys on insulation.
Idont think that burn originally understood your post at all.
You are allready watercooling CPU and NB.
Adding ICE gets you a better FSB clock.
Are you SURE that its the NB thats the factor, not the colder CPU?
I would suspect that the CPU being colder would also help FSB overclock.
Im supprised your not getting condensation allready if you running -11 water through your tubes. Please be carefull.
Oh, and as a side note.. running salt water in your watercooling system isnt good for it. You are much much more likely to get corrosion when using salt. It will be a good idea to flush the system out with clean water after benchmarking, to keep your blocks safe.
Good luck
Well... I already tried TECI'ing the NB, but my colplate was not good at all, so I wont push much Vmch until I get a better coldplate.
The insulation, was made with pure vaseline, and no condensation occured.
About the GPU, I already lost a x800gto, and I dont want to loose my 7300gt also, tats why I wont void its waranty for its 1 year long, so, It'll keep aircooled for the time.
the Tec wont run 24/7 to don´t push my PSU too much, only for benches, In fact, all this job is just to get the Allendale's Brazilian record for PI 1M, and I'm not keen on buying a p5b.
today I'll try a coldplate, little smaller than the TEC, just for a quick run, the weather is helping me with low humidity (30%)
the salted water has already been replaced, so, no corrosion problem!
The NB, is realy the problem, because CPU reaches easily 3500mhz with 1.4v, but for it, I need a real high Vmch (1.9v) any decrease on Vmch woud freeze the screen.
The memory isnt a limiter also, this pair of corsair values, works prime stable @ 550mhz 5-5-5 2.4v and can do almost 600mhz for suicide screens @ 2.7v
Holst, correct me if necessary, and sorry for my noobish, I'm 15 year old, trying to be an extreme overclocker :D
Tanx guys!
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