I know that moving water doesn't necessarily freeze at 32 F/0 C, hence why rivers still move during winter. If I had an ACTUAL GPH of around 250 or so, with distilled water and the recommended amount of Waterwetter, how low do you guys think the temperature can go before things freeze? I can probably experiment myself to find this out, but I want a sense of what I can expect

[SkiFletch]

well, although your overall flowrate is that many gph, you have to remember, that the flow at each portion of a cross sectional area of the tube is different. the flow is highest at the middle and lowest (approaching 0) at the edge....

[Neco]

If your gonna be dealing with temps close to cold enough to freeze water you might just consider using anti-freeze or something

[glass]

afaik if the water in rivers is over freezing point.. frozen shut tubing is not good. why not use antifreeze?

[Ct. Strangelove]

I agree, use antifreeze. without it you will see small ice fragments flowing in your water. They will form on device walls since there is low flow on the very surface of the devices interds.

[JFettig]

antifreeze kills the waters ability to trancefer heat... i would say around -5c you could go...

[AMD-Inside]

use that coolant stuff u can get for cars engines ... i'm sure that doesn't freeze below 0c

or maybe add a pinch of salt?? just a little so it lowers its freezing point

[safemode]

personally I wouldn't cool a cpu down that far because it's completely unecessary and more dangerous than it's worth. But if you must for some extreme nasty overclocking then you can afford to lose a couple degrees /m in heat transfer rate with anti-freeze over using water. You can get much colder with anti-freeze than with water and if you're going significantly lower than the freezing point, you'll make up for the lower heat transferrate.

a 30/70 of antifreeze to water ratio would be a good place to start. Cars use 50/50 but they also have to worry about extreme high temps. You can work up to 50/50 if you need to though.

Originally posted by maskedgeek
antifreeze kills the waters ability to trancefer heat...

Thanks for answering while I was somewhere off in real life lol...

As for the going too low part, I probably wont be able to go THAT low, but certainly at least to freezing itself.

[Avatar28]

Read the article posted on the overclockers.com main page a couple weeks back.

http://www.overclockers.com/articles609/

The best solution would be like an 80/20 or 70/30 ratio of water/methanol. That would give a freezing point of -21 and -31 degrees Celsius repsectively. Of course, there could be some potential long term health issues, particularly in an open system where the loop is open to the air.

[Wicked Klown]

Give this a look Zerex