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Changing rads to lower temps?

post #1 of 5
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While my water temps are more than acceptable for me (sub 70's for CPU, and sub 60's for GPU's), i'm looking to improve them further. One of my ideas is to change the radiators.

My loop order is Res > Pump > Rad1 > GPU2 > GPU1 > Rad2 > CPU > Res. I currently have the following setup:

Rad 1: Black Ice GTS 240 (at bottom), 4x Gentle Typhoon AP-2150 in push/pull, to cool the res water before going up the GPU's
Rad 2: Black Ice Pro II rad (at top), 2x Gentle Typhoon AP-2150 in push, to "cool a bit" the hot water from my GPU's before going to my CPU

My plan is to switch the GTS 240 to the top of my case (to cool GPU water) and replace the bottom fan with a thick rad (i'm thinking a RX240) and keep the fan configurations. Would this setup have a noticeable drop in temps (more than 3c, especially in the CPU) or would it just be a waste of money?

Also, what other things can i make to lower the temps in my loop?
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post #2 of 5
Outside of setting up your second rad in push/pull, I don't see your temps changing much. Your rads are pretty good, and I can't imagine that changing them to something different will change much other than maybe netting 2-3 degrees cooler. To me that's not worth the investment.
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post #3 of 5
Generally speaking so long as your rads are not overloaded you can't expect much of a drop in temperatures from adding more.

To get an idea of what is possible, try measuring the temperature of the water against the temperature of the air going into the rad. Anything less than 10°C is good, less than 5°C is excelent and less than 2°C is incredible.

Realistically you can't get much below a 2°C delta at load without crazy numbers of radiators, so take that as the limit and you get an idea of what you can achieve.
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post #4 of 5
Thread Starter 
Thanks for your input guys smile.gif
Quote:
Originally Posted by ChrisTahoe View Post

Outside of setting up your second rad in push/pull, I don't see your temps changing much. Your rads are pretty good, and I can't imagine that changing them to something different will change much other than maybe netting 2-3 degrees cooler. To me that's not worth the investment.

I thought of doing both rads push/pull, but sadly, my case does not give me enough clearance at the top to install the second set of fans. Hell, i had some issues looking for the right rad, as my Swiftech MCR220 just barely fits there (reason it went to my HTPC)
Quote:
Originally Posted by GingerJohn View Post

Generally speaking so long as your rads are not overloaded you can't expect much of a drop in temperatures from adding more.
To get an idea of what is possible, try measuring the temperature of the water against the temperature of the air going into the rad. Anything less than 10°C is good, less than 5°C is excelent and less than 2°C is incredible.
Realistically you can't get much below a 2°C delta at load without crazy numbers of radiators, so take that as the limit and you get an idea of what you can achieve.

How can you measure water temp correctly? I hope i'm not overloading my rads, AFAIK i have the "recommended" setup (120mm per device on loop+120mm for OC's), but with two Fermi chips, i'm starting to rethink some stuff. Plus, all i can add is one extra 120mm rad, as i don't want any rads going outside of my case.

I know my ambient temps will not help me at all (minimum of 24-28c, maximum of 35-40c) that is why i'm happy with my temps as they are (i actually thought they would be worse), but i'm looking to decrease temps, especially the CPU temps, because i will be swapping CPU's soon, to a more powerhungry quad core w/HT (best bets are 2600k/3770k, but if budget fails, maybe just upgrade to an 860/870) so they will generate more heat than a massively overvolted i3.
Edited by Starbomba - 8/29/12 at 11:34pm
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post #5 of 5
I wouldn't think you are overloading your rads, it seems that you have decent temps already. I was just saying that that is the one time where adding more rad space will make a significant change in temperatures.

For measuring water temps a normal thermometer in the res works, but if you want a bit more technical solution you can buy an inline temperature display and plumb it into your loop. You can also get similar displays with a foil type temperature probe which can be moved around, dangled in water or stuck to the side of rads with tape.

Alternatively you can go all out and get something like an Aquero, Koolance TMS or Heatmaster. These can measure temperatures and display / log them on your computer whilst controlling fan and pump speed. They get a bit pricy (>$80) and are only worth it if you want one anyway.

It is not too important where in your loop you measure the tempratures. Ideally you want to measure after it leaves the last rad in the loop but as we know the water temperature does not vary by much through the loop anyway.
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