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Welcome to The Frozen Path
Post pictures of your Dry Ice and Liquid Nitrogen sessions, pots, rig and result if you like.
If there is something you are wondering about this kind of cooling. Feel free to ask, and we'll do our best to help you out!
Members of the Frozen Path.
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Mega_option101 Team Captian of Overclock.net OC Team
CL3P20 - Pics #1 #2 #3 #4 #5
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New members are welcome.
As liquid nitrogen evaporates at -196 Â°C, far below the freezing point of water, it is valuable as an extreme coolant for short overclocking sessions.
In a typical installation of liquid nitrogen cooling, a copper or aluminum pipe is mounted on top of the processor or graphics card. After being heavily insulated against condensation, the liquid nitrogen is poured into the pipe, resulting in temperatures well below -100Â°C.
By welding an open pipe onto a heat sink, and insulating the pipe, it is possible to cool the processor either with liquid nitrogen, which has a temperature below −196Â°C, or dry ice. However, after the nitrogen evaporates, it has to be refilled. In the realm of personal computers, this method of cooling is seldom used in contexts other than overclocking trial-runs and record-setting attempts, as the CPU will usually expire within a relatively short period of time due to temperature stress caused by changes in internal temperature
Dry ice is the solid form of carbon dioxide (chemical formula: CO2), comprising two oxygen atoms bonded to a single carbon atom. It is colourless, odourless, non-flammable, and slightly acidic
CO2 changes from a solid to a gas at −78.5 Â°C (−109.3 Â°F) with no intervening liquid form, through a process called sublimation. The opposite process is called deposition, where dry ice changes from the gas to solid phase.
The density of dry ice varies, but usually ranges between about 1.4 and 1.6 g/cm3 (87-100 lb/ft3). The low temperature and direct sublimation to a gas makes dry ice an effective coolant, since it is colder than water or ice and leaves no moisture as it changes state.
Dry ice is non-polar, with a dipole moment of zero, so attractive intermolecular van der Waals forces operate The composition results in low thermal and electrical conductivity
Facts from wikipedia.org
An overclocker pouring Ln2 into his pots.
Cooling units; Pots.
1st Picture: North bridge Cooling unit from Kingpin Cooling.
2nd Picture: GPU Unit for cooling of the graphic cards GPU.
3rd Picture: CPU unit for cooling your processor.
Where can I buy a Dry Ice/Liquid Nitrogen pot?
This type of cooling are not very mainstream it's just the most hardcore enthusiasts who use it.
So you won't probably find a DICE/LN2 pot in a Store.(I know Koolance made a few)
Most pots are custom and are made by members of computer forums.
Only site I know of that you can buy right from is: Kingpincooling
Hardware Insulation Check post #2
Why sub-zero cooling like Dry Ice and Liquid Nitrogen?
Most people that have overclocked for a while just want colder and colder temps. They probably started with air, water and then moved from that to DICE/LN2.
With this kind of cooling you can increase MHz way above factory settings maybe by a 100% overclock + depends on what chip you use.
So with this kind of cooling you can run your computer for a short period at very high speed for benchmarking.
And remember all overclocking is at your own risk. You void warranty by overclocking your system and you can get fatal errors and even destroy your components. But this is a risk you have to take, if you want to overclock.
Where to get Dry Ice and Liquid Nitrogen?
At most places you have shops that sells propane and other types of gas. These stores often have Liquid Nitrogen and Dry Ice. Check out your home place for info about it.
But for using Liquid Nitrogen you'll need a Dewar. These can sometimes be rented at a gas store or you'll need to buy one which can be kind of expensive.
Here is a picture of Dewar's in different shapes and size.
For dry ice you'll only need a container/Box that is pretty air tight. Places where they sell DICE often offers you boxes for your dry ice.
Or you could actually use one of these:
The colder you can keep the Dry Ice the better it is. In a bag like that you'll loose around 20% by each night of your dry ice.