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Need to shave off a few more C degress with water cooling upgrades, need opinions please :) - Page 4

post #31 of 61
Quote:
Originally Posted by feniks View Post

Actually I figured I will take a hit on 5GHz OC this Saturday ... not that it became cold outside suddenly, no not yet wink.gif ... but I have an evil plan of placing my rig so the air intake (and my internal 360 rad) is oriented right in front of my AC cold air outlet when running at full frosty blast biggrin.gif
I might be able to drop down my CPU temps by good 5-10C with this approach if all works out as I think it would - sort of a computer Cold Air Intake LOL! biggrin.gif
Of course the ambient room temps will be cooled down to approx 22C if time allows (or max 24C if not much time).
Be careful with doing that, it could cause condensation on your motherboard or GPU.
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post #32 of 61
Thread Starter 
Quote:
Originally Posted by superericla View Post

Be careful with doing that, it could cause condensation on your motherboard or GPU.

good point! thank you for this post. I will make sure not to turn the ac off while computer is running... or I will shut down the system once ac starts cycling the compressor on & off, hopefully it doesn't ...
condensation happens when cold things start warming up, right? does it mean it could start building up while system runs cooled like that? or rather after I shut the ac off (or the compressor cycles off)?

I hope all it does is keeping my front radiator very cold ... and probably not much else... the air blowing through case will already get somewhat warmed up by components in case ... it won't like below zero C air either ... I think. will need to check the outlet air temperature of the ac.

last time I ran AC at full blast (set to 60F and max fans) for about 1.5hrs and it didn't cycle as outside air was cooling the compressor efficiently, but back then I didn't have my computer in front of it...
Edited by feniks - 10/2/12 at 10:11pm
post #33 of 61
Quote:
Originally Posted by feniks View Post

good point! thank you for this post. I will make sure not to turn the ac off while computer is running... or I will shut down the system once ac starts cycling the compressor on & off, hopefully it doesn't ...
condensation happens when cold things start warming up, right? does it mean it could start building up while system runs cooled like that? or rather after I shut the ac off (or the compressor cycles off)?
last time I ran AC at full blast (set to 60F and max fans) for about 1.5hrs and it didn't cycle as outside air was cooling the compressor efficiently, but back then I didn't have my computer in front of it...
Condensation happens when an object is at a temperature below the dew point, which can be easy to reach next to an AC unit. Air conditioners often blow out cooler air than what the thermostat is set to, so it can cool the room more quickly. Because of that, the computer (while next to the AC) would be much cooler than the rest of the room and would have a high chance of condensation.
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post #34 of 61
Thread Starter 
Quote:
Originally Posted by superericla View Post

Condensation happens when an object is at a temperature below the dew point, which can be easy to reach next to an AC unit. Air conditioners often blow out cooler air than what the thermostat is set to, so it can cool the room more quickly. Because of that, the computer (while next to the AC) would be much cooler than the rest of the room and would have a high chance of condensation.

I see, makes sense. Anyways to calculate the dew point? I'd like to make sure I stay above that level ...
post #35 of 61
Quote:
Originally Posted by feniks View Post

I see, makes sense. Anyways to calculate the dew point? I'd like to make sure I stay above that level ...
Here is a dew point calculator online. You'll need a humidity and temp reading to calculate dew point.
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post #36 of 61
Thread Starter 
Quote:
Originally Posted by superericla View Post

Here is a dew point calculator online. You'll need a humidity and temp reading to calculate dew point.

thanks for this link!

hmm, I am getting a bit scared now. I need to measure the temperature of AC outlet air at full blast, but it seems it might be a problem in fact.

I used my target ambient room temp (after I cool the room down) of around 72F, put some average humidity of air conditioned room (35%) and it seems the Dew Point is landing at 42F ... not too good ... the AC outlet air temperature might be well below that... I need a hygrometer ...

just curious if the condensation would occur mostly on my front rad (doesn't bother me) or also inside the computer (big trouble), since the air stream would get already warmed up going past the radiator and meeting a warmed mass of air inside the computer, no?
Edited by feniks - 10/4/12 at 9:14am
post #37 of 61
Thread Starter 
even worse than I thought ... if it rains outside then I assume the room humidity is higher even with AC on, let's say 50% (while outside could be 75-90%) ... and in such scenario the Dew Point get much higher, eg.. 42F @ 50% humidity (at same ambient temperature of 72F).

for sure I will not pull it off this weekend (raining), seems I need a dry weather at least and as cold room temperature as possible ... might wait a week or two until raining season stops and temperature outside drops more...
post #38 of 61
Quote:
Originally Posted by feniks View Post

even worse than I thought ... if it rains outside then I assume the room humidity is higher even with AC on, let's say 50% (while outside could be 75-90%) ... and in such scenario the Dew Point get much higher, eg.. 42F @ 50% humidity (at same ambient temperature of 72F).
for sure I will not pull it off this weekend (raining), seems I need a dry weather at least and as cold room temperature as possible ... might wait a week or two until raining season stops and temperature outside drops more...
Another option is to set the air conditioning to a lower temperature and just have the computer in the same room as the AC. It would get better temperatures without risking condensation.

For instance, my room right now is set to 64F and I get load temps under 60C overclocked to 5GHz.
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post #39 of 61
Thread Starter 
Quote:
Originally Posted by superericla View Post

Another option is to set the air conditioning to a lower temperature and just have the computer in the same room as the AC. It would get better temperatures without risking condensation.
For instance, my room right now is set to 64F and I get load temps under 60C overclocked to 5GHz.

that's what I did last time for 4.9GHz and it was still almost at thermal limits, no good for my chip at 5GHz ... actually my 3770K CPU runs super hot and I hate it for that, basically its under load temp sky rockets above 1.30V actual vcore under load and even my water cooling can't handle that. it's the second 3770K I have and this one is even worse (temperature wise) than a former one I had.
right now I have my CPU at 4.8GHz with 1.344v actual vcore under IBT load and it produces up to 98C on hottest core ... that is with AC running and set to 72F (however room temp is around 77F).

My ambient room temp without AC is high, up to 28C/82F in evenings nowadays (top floor apartment under roof) even when outside temp is only around 70F. anyways, now it's been raining for a few days, so humidity is high and it only makes it feel worse. tomorrow will be getting warm again (80F), then temps drop on weekend, but it keeps raining ...
post #40 of 61
Thread Starter 
I am putting 5GHz attempt on hold until I sort out issues.

Above means:
-getting the hygrometer (ordered)
-new Prolimatech PK-3 thermal paste (5g syringe ordered), I am out of good quality "soft" TIMs and I have some suspicions about ICD paste contact between IHS and block (need to double check it anyways)
-installing water and intake air temperature sensors (ordered)
-draining the loop and opening Raystorm CPU block for inspection (suspecting some dirt/clogs from past when I used Primochill tubing leeching some white powder crap and such causing an issue now)
-installing 2x AP-15 push fans on external rad (need to disconnect it to install them)
-waiting on better weather (no rains raising humidity, lower outside temps to make it easier)

Approx. 2-3 weeks hold.
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