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Difference between Radiators - Page 2

post #11 of 14
Why don't you calculate what your thermal load is for your system and use Skinnee Lab's charts to see how much heat your rads can dissipate vs. the amount of head loading you have.

Also, what is the ambient temp. in your room? The most often overlooked thing in water cooling is that all the rads in the world can't cool below ambient so if your in a room at 26c then don't expect your temps to be 30c at full load.
post #12 of 14
I used Martin's Flow Rate Estimator to make a decision on my radiators. It uses review data from Skinnee and Martin combined with magic to give you an estimate on flow rates and temp deltas.

I found with fan speeds of 1000-1500RPM the RX360 and the MCR320-QP are almost always within 0.6C of each other under different loads. If you move to BI GTX 360s you might see 1~2C with your fans on full like someone said before. For twice as much money you have to decide if it's worth it.

Like CL3P20 said, your pump might not be sufficient. I won't really question your block as XTs are within 1C of the top performers. Though it might not be seated very well. What kind of pump do you have?
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post #13 of 14
If you can record the water and ambient temperatures under load then you can get an idea of how much it is possible to knock off your temps. You should be aiming for less than 10°C, preferably in the region of 4-7°C difference.



If this is not possible then a good and simple way to check how your loop is running is:

1. Turn the system off and leave for long enough for everything to cool to ambient (preferably overnight).

2. Boot up and immediately full load all the components in your loop (CPU and / or GPU).

3. Record temperatures from the boot until they stabilize, probably 1/2 hour but maybe longer.

4. Look at how much the temperature rises from full load just after boot to stable temp. This is mostly, but not entirely, due to the water heating above ambient.




Changing rads is not going to help a whole lot, especially if your water - air delta is already low. Adding more rads will always help, but again the improvement might be small if your loop is running well.

Remember: You can only cool the water to near ambient (1-3°C difference), after that you need to look at something other than rads to improve the cooling
Edited by GingerJohn - 4/21/11 at 4:40pm
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post #14 of 14
Very good suggestions..
w00t..
Thank Goodness we got some good ppl on this site!!
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