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I'm a bit of a rookie with the system myself, but I don't believe what you're describing is possible. Given your goals, if you have an accurate way to measure the temperature of your coolant (I believe Aqua sells a product that ties into the Aquaero 5), I would base fan speeds off of that directly as that determines the temps that the components will reach. Also, keep in mind that water changes temperature more slowly than air cooled solutions do, so you'll probably want to be moderately aggressive in setting the temperature at which fan speeds reach 100%. Given that you have no desire to overclock, I would suggest 100% fan speed at a water temp of 35-40 deg C.so bottom line: is it possible to define more than one fan controller and use the max of those to drive fans?
any ideas is appreciated,
cherers
Thanks a bunch for your reply! Yet I think that based on the fact that GPU or CPU blocks will have a certain thermal resistance, as they inject heat inside the water, they create a temperature gradient. in other words, CPU and/or GPU temperature is not necessarily the same as the water. I think it might be anything between 5-25 degrees higher. so basing your fan power on just the water temperature seems a little bit risky.I would base fan speeds off of that (water) directly as that determines the temps that the components will reach.
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Dieser Beitrag wurde bereits 2 mal editiert, zuletzt von »cc01« (30. Januar 2013, 08:48)
Dieser Beitrag wurde bereits 2 mal editiert, zuletzt von »Jakusonfire« (2. Februar 2013, 09:05)
Wow that is a really complicated system you describe and I can't see any benefit to it.
The Aquaero controls the speed of fans ... which cool the water ... as long as the water is kept to a low temperature the cooling effect on the water blocks is the same. The CPU and GPU temps will jump up and down with varying load but water temperature will stay relatively stable and change slowly.
The best way to control your cooling is to base the speed of your fans on the difference between the ambient air temperature and the temperature of your water. You do this by creating a virtual sensor.
You then apply that virtual sensor to a curve controller or multiple controllers so that all fan speeds climb as the water to air delta ( temp difference) climbs.
That way the fans stay at low speed when your computer is idling and speed up slowly when you put it under load. They will also then stay at higher speeds til your coolant has dropped back down in temperature after you stop using your PC.
Basing your fan speeds just on water temperature would mean your fans will speed up if the air temperature rises even though it would give no benefit.
Dieser Beitrag wurde bereits 1 mal editiert, zuletzt von »jpmboy« (3. Februar 2013, 23:47)
My advice. Keep it simple, use water temp.
0% on the fan curve = 0 volts = stop.AS2012 has start, but not stop parameters.
Dieser Beitrag wurde bereits 1 mal editiert, zuletzt von »Jeremy« (5. Februar 2013, 05:35)
Their is a startup temp in the curve controller just don't check the box that says hold minimum power in the fan setup. I set the curve controller to 0% power lower than the startup temp I wanted just to make sure.0% on the fan curve = 0 volts = stop.AS2012 has start, but not stop parameters.
The biggest issue I have with using dT to determine fan speed is that the system won't compensate at all for changes in ambient. If your ambient is pretty steady year round this isn't an issue, but if your ambient is 65 deg F in the winter and 85-90+ in the summer like it is for me you might want to consider using straight water temp instead of dT. Sure, it'll be noisier in the summer, but that's because it needs more cooling when ambient is high. To me, that's acceptable.
Dieser Beitrag wurde bereits 4 mal editiert, zuletzt von »Jakusonfire« (5. Februar 2013, 10:28)
In my particular case, the top fan is weird. I get much better idle temps with it on, but much better gaming load temps with it off. So I have it set to turn off when GPU temp reaches a certain point.Why would you ever want your fans to stop?
It took me a while but I eventually came around to operating on air/water Deta t. However I can see situations where one might want to change fan speeds based on other than water temperature.
Some motherboard components such as pch can run pretty hot, then there might be consideration for other equipment such as PA2's being undervolted. Fortunately I have a pretty roomy case/pedestal system so airflow is decent.
Do some of you actually see 10c delta between air and water? I don't think I've ever seen over 3c difference, and I do quite a bit of overclocked benching. That is what finally brought me around to using air/water delta input for curve controllers as hearing the fans ramp up constantly was quite noisy, and unneeded.
I will admit I have overkill on radiators, though, but they are doing exactly as I planned. Less fan rpm and a quieter machine overall.
Yeah I suppose I see very low deltas compared to some. Here I've been fussing around with calibration, and controlling over a 3c increase in water temps under load, lol. My setup has been very efficient at cooling all along. I guess having those two 480mm radiators in the pedestal gives them enough isolation to be really good, then I have a 240mm in the case.It took me a while but I eventually came around to operating on air/water Deta t. However I can see situations where one might want to change fan speeds based on other than water temperature.
Some motherboard components such as pch can run pretty hot, then there might be consideration for other equipment such as PA2's being undervolted. Fortunately I have a pretty roomy case/pedestal system so airflow is decent.
Do some of you actually see 10c delta between air and water? I don't think I've ever seen over 3c difference, and I do quite a bit of overclocked benching. That is what finally brought me around to using air/water delta input for curve controllers as hearing the fans ramp up constantly was quite noisy, and unneeded.
I will admit I have overkill on radiators, though, but they are doing exactly as I planned. Less fan rpm and a quieter machine overall.
That's the beauty of having giant cases with pedestals and separate sections or the like. It allows uninterrupted and unpolluted airflow for great deltas.
In a regular PC case a delta of anything under 10 is considered good.
I have seen lots of people claim very low deltas at all times and I always have to wonder if their sensor setup is really giving accurate results because to achieve that requires an extraordinarily efficient system. Without enormous rads the water temp simply has to be higher according to the laws of thermodynamics ... more heat energy is dispersed at higher temp differences. It takes a much larger surface area to disperse a couple hundred watts at 2C compared to 10C
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I have a few suggestions/notes you might consider that could help. One, how steep is your ramp? If it's too steep, you'll get large/noticeable increases in fan speed with small increases in temp. Two, consider a stepped ramp instead of a pure linear one. 25% for dT from 0-3 deg C, 50% from 3-6, 75% from 6-10, 100% for 10+. Those numbers are just a suggestion, but broad plateaus like that might keep the fans from changing speed so frequently. Constant speeds are generally less noticeable/bothersome because the pitch/noise doesn't change. Also, note the speed/voltage where the fan noise becomes apparent and tune your fan curve around that and only go above that when you really need to. I have one fan that's noticeable at 12 volts but near silent at 10 volts, so I keep it at 10 volts or less most of the time.however under load I get regular and pronounced fluctuations of fan speed.
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