Hi guy's, Ive just run two 15min tests with OCCT. The first with my radiator fans turned up to their highest speed and the second with them turned down to their lowest. Ambient temp was 23c for both tests. Both tests had the same CPU and MB temps throughout the tests and the second giving me a much quieter environment. I'm guessing the rad can only get to a certain coldness and the lower speed is still providing this coldness. If this is the case I can afford to loose a lot of noise which would be great. Am I correct or should I run the tests for longer periods? Anyone else had an expierence like this with their rig?
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Same temps with lower fan speed!
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Your are exactly right. The water can only get to a maximum coolness of the ambient air temp. Depending on how much you OC the components in your loop will determin how much heat removal you need in order to maintain a maximum temp. I think 15min may not be long enough to mind your max temp but I could be wrong. Def lower your fan speed to a point to where the temps are not rising but you will get to a point if you add more heat to the loop(add gpu, NB or increase vcore) the the added air speed will help.
Hope this helps. Please correct me if I am wrong. Just started into this WCing thing.
Yes I think your correct. The more heat in the loop the quicker the rad heats up, and the quicker the rad heats up the quicker you need the cold air running through it thus speeding up the fans. At the mo I have the CPU and NB watercooled and I think I will leave it at that. I will run two 1hr tests with the high and low fan speed to see haw it does. Then I will up the heating in the house a bit and test them again. Should be interesting. I will post back the results over the next few day's. I'm hoping the results are the same for both tests which will allow me to leave the fans on low. I have 3 120mm fans on this rad so low might be enough in any situation but the tests will tell the truth. Will post back asap.
What's the total liquid volume of the system? Any idea? I've seen tests of Zalman's Reserator system where it took a few hours (2-3) for the temps to stabilize because there's so much volume in the system.
Triple radiator and 3 fans definitely sounds well within the limits for CPU and NB only, you planning some big overclocks?
Triple radiator and 3 fans definitely sounds well within the limits for CPU and NB only, you planning some big overclocks?
Betrayer00GT
Limp Gawd
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I think your test method told you something very specific about the lower fan speeds. I don't think what it told you actually matters, though. Not saying you shouldn't lower your fan speeds if you want to, just that this test didn't help you get any useful information on what is the actual "cost" involved in doing so. Not really.
Basically, what you discovered is that the lower fan-speed doesn't make a significant (whole degree Celsius) difference over a 15 minute time-frame, according to the conditions of your testing (load, initial water temp, ambient air temp). How useful is that piece of information, really? Not very, IMO.
You need to already know how long it takes your system to reach a stable temp, with a stable ambient air temp, while being loaded like that. Then you could get the loop's water back to the same starting temp and run the test again with the same load and ambient temp, but the new (lower) fan speed. On both tests, you could chart the results over time. That would give you all the information you would need to see what is really happening. If you had enough information and knew a bit of math you could predict the outcome, but "enough information" is not likely available for your equipment and exact setup, of course.
Just my $.02.
Yes, as soon as my Asus Rampage Formula X48 arrives which sholud be the next day or two. I'm running a Q6600 which I could not get a good overclock on my P5N-E SLI so I cant wait for my new board to arrive and it's supposed to be a very cool (temps) board.
It was just an initial test. Ive run two 1hr tests since with both tests with the high and low fan speed producing the same temps THROUGHOUT the tests. My next step is to find the stable temps at stable ambient so I will run a 6hr test at full fanspeed until I get stable temps and if I do in that timeframe I will run the same test at low fanspeed after CPU & MB & LOOP temps have dropped to the level I started the first test at with the same ambient. With my home heating switched off in the evening Ive been getting 23c case temp for the past few days but I will monitor it closely for changes. And yes I'm not bad at math.
It seems that the cooling loop isn't air-side limited, but thermal resistance limited with the heat transfer to the coolant.
A few things to think about here.
If you turn down the flow to the pump, will the temps reflect a change? If so, then the flow was running to fast. As the pump slows and the temps rise, turn up the fan speed to compensate.
However, you may like to leave everything alone and to enjoy low speed fans for it's quietness.
A few things to think about here.
If you turn down the flow to the pump, will the temps reflect a change? If so, then the flow was running to fast. As the pump slows and the temps rise, turn up the fan speed to compensate.
However, you may like to leave everything alone and to enjoy low speed fans for it's quietness.