Watercooling and Phase Change stuff

Soldato
Joined
18 Oct 2002
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Aranyaprathet, Thailand
Watercooling gallery at [H]ardOCP
Watercooling Gallery at amdmb
Watercooling gallery at overclockers.com
Gallery at Pro-Cooling
Gallery here at OCUK

Water-cooling reviews and tips from overclockers.com
Overclockers comparative waterblock tests
Pro-cooling's Interactive block comparison


What should I buy?

Kits:
Basic kits like WaterChill are fine for beginners who do not want to design their own systems. They will happily cool a reasonably over-clocked system.

The Waterchill kits now use Hydor pumps and Black Ice radiators but be warned that the supplied Black Ice Pro is the poor relation of radiators. The Power kit comes with a good Hydor pump and the new Antartica block is a much better one than the one usually supplied with the cheaper Waterchill kits.

DIY:
The major manufacturers are DangerDen, D-Tek, Swiftech and BeCooling. The really hard-core make their own blocks but this is not for the faint of heart. Buying individual components to make your own system will yield better results than the kits above. You will also have the satisfaction of having your own personal system.

DangerDen do kits which are available from a number of UK retailers who obviously cannot be listed here. These kits will likely give better results than WaterChill-type kits but we are talking a few degrees at best. Their RBX and TDX blocks are very close in performance to the WhiteWater (see next).

D-Tek now sell the Cathar-designed Little River White Water (LRWW) and this is one of the best mass-market blocks available today. It costs around £45.

Swiftech's new 6000 blocks are very good and are exceptional value. Tests put the 6002 at the very top of the heap. Swiftech are also now manufacturing the Cathar-designed Storm G4 and at a very reasonable price! Available from OCUK!!!

The best block is unquestionably Cathar's Storm G5. It is made in extremely small quantities and is most definitely not cheap! Production is currently suspended so get the Swiftech Storm above.

Chipset blocks are not common and the most used is the DangerDen Z-Chip. Unfortunately it is also proven to be a flow-killer considerably damaging the overall cooling of the whole system.
GPU blocks come in two different formats for ATI and NVidia.

Pumps:
Eheim make the most commonly-used pumps and the two main contenders are the 1048 and 1250. The 1250 is more powerful but quite a lot larger. These can be bought from specialist water-cooling stockists but also (usually cheaper) from fish-tank vendors. Other manufacturers include Hydor, ViaAqua and MaxiJet. The very best pumps are Iwaki but are not easily obtained. A new arrival is C-Systems which make a very small powerful 12v pump. 12v pumps are also now being sold by Dangerden and Swiftech. They are re-badged Laing pumps. Make sure you get the D5 version not the D4.

Radiators:
Radiators can be bought from specialist companies like HWLabs who make the BlackIce range or Thermochill who now sell the Cathar-designed PA160. These are basically copies of car heatercores (also known as heater matrixes). Heatercores from Vauxhalls seem to be the most popular amongst the watercooling community and can be bought from scrapyards for under £20. They would then need slight modding of the inlet/outlets which is a simple matter of cutting off some of the copper piping and then gluing in some barbs. Pre-modded heatercores with barbs pre-fitted are available for around £40.

Tubing:
Tubing is normally either 3/8" or 1/2". Tygon or Clearflex60 are the only decent choices. It is very common for beginners to try to save money on tubing and then end up buying Tygon/Clearflex anyway. Just don't buy cheapo silicon tubing and expect wonderful things. Clamps can be bought from B&Q for a couple of pounds for a pair.

Fans:
Most rads fit 120mm fans and there are many available. The cheapest are Evercool fans which give around 80cfm at roughly 30dba (manufacturers numbers). More powerful fans are available but these are usually much noisier. Since better performance can be obtained if the fan is slightly away from the actual radiator, it is common to use a shroud. 38mm-deep fans are the best for restrictive radiators.

Water & Additives:
Do not use ordinary tap water as it contains large amounts of minerals such as calcium which will build up in your block, rad and pump like cholesterol in your arteries. Use distilled water available from Halfords for relatively little. You can also buy Coolant Conditioner from Halfords to prevent algae growth. Commercial additives such as WaterWetter are expensive and gimmicky. They do not aid the cooling efficiency of the water at all.

TECs:
TECs are clever little widgets using the Peltier effect to provide sub-zero cooling to cpus. It requires specialist power supplies, very powerful water-cooling to cool the TEC and insulation on the cpu to prevent condensation. Avoid.

Phase-Change:
If you want cooling to TEC level, you would be better off buying Phase-Change such as Vapochill available here at OCUK.

A simple kit for a beginner is as follows:

A Swiftech Storm or Dangerden TDX or D-Tek LRWW
Eheim 1250 pump or Swiftech MCP655
Nova Heatercore
Evercool 120mm fan
8' of Tygon

This should come to well under £150. Before trying to cool chipsets and gpus, start with the just the cpu and see how you get on. Water-cooling is not for everyone as can be seen from the amount of second-hand equipment for sale here. Bear in mind that much of the for sale items are from people who have upgraded to better components so buy with care - there is likely to be better stuff available for new and for not much more.

Finally, the best aspect of water-cooling is the individuality of it. Just like modding, it is much more fun to design and build it yourself from your own research than to simply copy somebody else or ask for someone to tell you what to use.
 
Soldato
Joined
9 Jan 2003
Posts
21,023
Location
Cornwall
I'd like more info about TECs etc,
you say "don't" but I'm a boy, and you know what happens when you tell a boy not to do something




coincedentaly, its why i have no eyebrows
 
Soldato
Joined
18 Oct 2002
Posts
8,275
Location
Aranyaprathet, Thailand
Two FAQ:

1) What if I put a reservoir in a mini-fridge?

A) A mini-fridge (even a big fridge or freezer) is designed to take a room temperature item and cool it. Once cooled, it remains cool thanks to the fridge's insulation and minimal cooling. If the reservoir is in the fridge it will be being fed warm water constantly requiring the fridge to run continuously. It is not designed for this and will quickly fail. Even a freezer will have to work harder than it is designed for making it far noisier than simply using a fan on a radiator.


2) What if I connect to the cold-water tap?

A) Ever heard of a water meter? The environment? Waste? Aside from those environmental issues, mains water is cold and this will cause condensation on your entire system including the pipes and blocks.

I did hear a story about a guy who connected tubing to his cistern and pumped that water to a tank by his computer. His radiator was immersed in the tank and so was cooled by the water from the cistern. The cistern's water was regularly flushed (busy household!) so the secondary heat loop was kept at a resonable temperature. I don't have the link but it shouldn't be too hard to replicate a system like that.
 

Neco-Ingredi

N

Neco-Ingredi

I've been thinking about water-cooling for a while, this has certainly provided enough material to keep me reading for a day or so... Yes, I am a slow reader.


This place is full of useful things like this..
 
Soldato
Joined
18 Oct 2002
Posts
8,275
Location
Aranyaprathet, Thailand
Originally posted by Cathar here
Flow rate is constant. The actual pressure that the water is under at any point is irrelevant. Impingement blocks are no more affected by the pressure of the incoming water than their non-impingement counterparts.

The ordering of the radiator and the waterblock is almost totally irrelevant as the thermal capacity of the water means that it simply does not rise and fall in temperature by more than a few tenths of a degree C as it moves around the loop.

Having said that, the optimal way to set it up, if one is so inclined to be picky about it, is

reservoir->unrestricted opening into pump->radiator->waterblock->reservoir

or for closed loop systems, omit the reservoir.

However, if plumbing routing constraints imposed by spatial limitations means that it's easier to do pump->block->radiator, then do that instead. The only difference between the two is the pump heat gets added to the water before the water enters the CPU. The rise in water temperature via pump heat added per pass through the pump is almost always going to be less than 0.1C for almost every water-cooling setup I can think of.

Regarding people who saw 10C differences, I do not doubt their honesty in claiming that they saw such differences, I just doubt that what they saw was ever the result of what it was that they think they were measuring, as I can assure you that the water temperatures simply do not swing enough to ever cause such a difference.

Water roughly has a thermal capacity of 4200J/kgC. Water roughly has a density of 1.0. This means that at 1LPM, per second the water can absorb 70W of heat and rise by just 1C. For low-flow systems with Eheim 1046's pushing a system-wide flow rate of 1LPM, the pump heat is around 3W or so, or around a 0.05C difference as the water flows through the pump. For those with the very strong Iwaki MD30-RZ's, pushing 10LPM through a system and the pump is dumping ~50W of heat into the water, we're still talking about a 0.07C difference.

In short - the ordering of the components is trivially unimportant. 10C differences are NOT going to happen unless the user was experiencing something else going wrong.

This really should answer all questions regarding flow order and pump heat.

Please, please, please read the article linked in the next post. It should be required reading for anyone even thinking about asking a question about water-cooling, let alone actually diving into water-cooling.
 

Mick Wood

M

Mick Wood

watercooling

Got a Zalman Reserator,but my motherboard has a non standard cooler mounting(P4).Any idea where I can get a standard clip-on cooler mount?
Mick Wood(a newbie)
 
Soldato
Joined
18 Oct 2002
Posts
8,275
Location
Aranyaprathet, Thailand
Re: watercooling

Originally posted by Mick Wood
Got a Zalman Reserator,but my motherboard has a non standard cooler mounting(P4).Any idea where I can get a standard clip-on cooler mount?
Mick Wood(a newbie)

Mick, please start a new thread with your question. This sticky is for general information rather than individual questions.
 
Associate
Joined
16 Mar 2005
Posts
49
Location
Newquay
ive seen a new sort of cooling which is like a gel that all of your components are submerged in, has anyone else heard about this and do OC sell it as i have not been able to find anywhere that does thus far
 
Soldato
Joined
27 Mar 2004
Posts
6,693
Location
Devon
Lewis that stuffs not out yet, if Im thinking of what you have seen. Its a liquid if I am right because it can evaporate if not sealed. And its not fully tested yet so dont expect in on sale anytime soon. But then OcUk will have it. After all. Think of the endless overclocking abilitys...well, if you have a Celeron then forget it :D

edit::
Ultimate cooling
if this is what you mean?
 
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