Safe AIO LIQUID Temperature?

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Duncan_94

Duncan_94

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Hi,

Recently I have started to notice that my AIO radiator fans have been noisier than usual. The fans are directly linked to the temperature of the liquid within the AIO - the higher the liquid temp; the faster/noisier the fans.

My question is: what temperature is considered normal/safe when it comes to the AIO liquid (I am not talking about CPU temp).

Edit: CPU = 7700K (stock clock speed) AIO = Corsair H100i v2 (default pump speed and fan speed)

Thanks!
 
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dudmont
While I've never used corsair link. Doing a little reading on it, tells me it's the way to control your AIOs fan speeds. Time to do some tinkering with your software. ;)
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Duncan_94

Duncan_94

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Completely new PC. All components were new, built about 4 months old or so.

I should mention I have a 7700K at stock clock speeds and it's a Corsair H100i v2. The pump is on standard/quiet mode so it runs slower than 'performance' mode. Default fan curve in Corsair Link.
 
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dudmont

dudmont

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Ok, that's what we needed to know. Btw, safe temp is less than boiling point(which depends on what's in the liquid coolant).
Has anything changed since before you noticed the fans speeding up? Installed any new programs? Has the temperature in the room changed? Has the load on the cpu changed at all? Do you have a way of monitoring the pump speeds? Does the aio need a good amount of compressed air blown on it? Are you running cpu-z or another good cpu monitoring program? If yes, are the temps any different?
 
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Duncan_94

Duncan_94

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Liquid temps when gaming are generally between 32c-36c. I'm not sure why I all of a sudden started to notice that the radiator fans are louder (they have proably always been this loud). Using Hardware Monitor CPU temps are around 50-60c depending on which game I am playing. Pump sits at a constant 1920rpm and the fan sppeds vary depending on liquid temp. No new programs (apart from a Steam game) have been installed. I live in an old house which can cause dust issues but I clean the front filter every month or so.

My temps are fine as far as I am aware but I am just wondering as I might create a less aggressive fan curve in order to reduce fan noise.
 
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JackNaylorPE

JackNaylorPE

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1. Are fans used as intakes or exhausts ? If ya read ya manual, Corsair says that they should be used as intakes for best performance... they are correct. And if ha don't have more intakes than exhaust, not only are ya sucking in dust, the air carrying it includes a substantial portion of PSU and GFX card exhaust

2. Four months ago was April, now we in the dog days of summer ... ambient temps are higher so cooling effectiveness is reduced.

3. The CLCs can't hit the desired price point complying with that rule so they use thermally inefficient aluminum radiators. This combined with the weak pumps (0.11 gpm) have negative impact on water cooling.

4. It's to early for this after 4 months but a) all CLCs violate the 1st rule of water cooling which says "never mix metals in a loop". There is a high galvanic potential between aluminum and copper so once the corrosion useful life expires after 18-24 months, galvanic corrosion will accelerate. See the results here.

https://martinsliquidlab.wordpress.com/2012/01/24/corrosion-explored/

Again, this should not be a worry after 4 months but some crud buildup should be expected after 30 or 36 if you see this accelerate 2+ years from now.

i am betting on Option 2

 
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dudmont

dudmont

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I'm in agreement with Jacks option 2. Your numbers are good. Changing fan curves depends on how they're connected. Mobo connected fans are easily adjusted via the bios. Fans connected through case headers are a different story. Let us know how your fans are connected and we can get you down that road a little further.
 
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Duncan_94

Duncan_94

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I have 4 fans total. 2 exhaust fans that come with the NZXT S340 Elite case (rear & top) and 2 intake fans at the front which is pushing air through the radiator (photo of build in sig). The case fans are connected to the chassis fan connections on the mobo and the CPU temp determines how fast or slow the fans run. The 2 intake/radiator fans are connected to the pump and the pump is connected via a mini USB to the mobo so that it can use Corsair Link. It's cold today and it's currently 9:50 am. Liquid temps @ idle are 22c and the radiator fans are 840rpm. Chassis fans are sitting at 470rpm. CPU temp is 28-29c.
 
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JackNaylorPE

JackNaylorPE

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Are they the same fans ? If so the 2 intake fans have reduced air flow due to the restriction from the filters and radiator.... meaning you have a lot more air being sucked out than is coming in from the front. So, you have a lot of hot PSU and GFX card exhaust air carrying dust into the case. The V2 fans are 2500 rpm so if the case fans are 1200 rm, they might be able to overcome this deficiency.

Buy some 'canned smoke" (used for testing smoke detectors) and spray it on the direction of your vented slot covers and rear case grilles. If smoke gets inside, call Houston and say "we have a problem" :)

Add more intakes and / or reduce exhausts till smoke no longer goes inside.



 
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