forums.pcapex.com — Make sure you aren't eating when you check it out. :) Some nice algae growing in the res as well as goop all in the channels of the CPU water block. The moral? Change the coolant in your loops regularly instead of waiting over a year. :)
Dec 24, 2006 View in Crawl 4
glitterkillDec 25, 2006Submitter
First off in response to many other comments... I did use distilled water, not tap water. If I used tap water it would have been 10x worse.@drjekelmrhyde: I used rubbing alcohol and a nail scrubbing brush. :)
maninblac1Dec 25, 2006
@JWfokkerOkay, what you describe is a poorly mixed system (a real system), one where T throughout the system is not uniform. Then the higher the flowrate, the better, only because it makes T more uniform, it decreases the temperature at the CPU and increases it at the radiator. The question is at what flow rate do you consider the system well mixed, and by how much will increasing the flowrate improve your performance?In my system i have roughly 2 cups of fluid in the system leaving out the reseviour, and a pump that is rated for about 8 cups a minute, a pretty slow system in my opinion right? I'd definately say that this is a poorly mixed system with tempeture extremes, in this case a higher flow rate is beneficial because it significantly cuts down the extremes of the system. So what if my system was more powerful, with 20 or 30 cups a minute, is it well mixed? Well JWfokker your tests say it's better but probably not the best and i'd agree.But if i make my system very high pressure/velocity, will i see that much gain, probably not, not because of friction or pump inefficiency, but because that's life, we don't see jet pumps for water cooling systems because it is more expensive than the gain it provides, IMHO.As i said engineers specialize in systems that are at steady state, something which our water cooling environment is not, as nothing ever is, unless it is greatly idealized such that T is uniform, which i assumed. At which point the flow rate does not matter, because thermally you can not tell a difference between the system if it's running at 30 cups a minute or if it's standing still, at least not at any specific point in time, dirac(t-x) to be specific.The most ideal solution is this, have 2 pumps (because nozzels and expanders (forgot the technical name) have poor coefficients (like elbows etc) and more pressure would be desirable), one at the radiator start and then increase the tube volume/insert a reseviour in the radiator section of the system, then have one at the end. Finally then have a thin tube high pressure/velocity section that passes water through the water block, ironically you see many setups like this because it is thermaly effective, or did you miss that in the real life implementation???It's not that i don't understand the "real world", i'm merely pointing out that generalizing the fact that faster is always better isn't true.
diamondiceDec 25, 2006
dbr_onix, better some dust and a failed fan that results in some rebooting (nearly every system today has overheating protections built in, and most graphics cards will start locking up long before the heat damages them) than a half gallon of water spraying all over my 2 $700 graphics cards.
obkenobiDec 25, 2006
[quote]Only communists don't celebrate Christmas[/quote]Oh yes they do. They just don't celebrate the Je$us part. Which is smart of them to do, since Jesus is a mythological character no more real than Santa Claus or Batman.
diamondiceDec 26, 2006
Call me old fashioned but to me Liquid (non-conductive or not) + Expensive gadgets = Bad Mojo, no matter how I look at it.
derrekitoDec 27, 2006
I'd be afraid of adding sodium anything ... wont it rust?