As promised some temps results. Please note this is not scientific testing by any means. Actual temps are dependent on many factors.
Ambient was ~22C (+/- 1) during all tests.
Some explanations:
- My 2 rads config was: 1 rad with 4SP120 @ 5V (~950rpm), 1 rad with 2SP120 and 2GTAP15 @7V (~1350rpm and 1050rpm), on top I had 140 fan blowing out @1000rpm
- My 3 rads setup is 3x4SP120, plus 140 fan @ ~600rpm
- stock means: i5-750 @ 2.8GHz (1.17V), gtx670 default settings
- OC means: i5-750 heavy OC @ 4.2GHz (1.376V) gtx670 boost clock 1100Mhz
- all tests included ~1 hour of fps gaming (very good load on GPU and CPU)
- CPU Ave max means average of max core temps registered during the test (HW monitor), delta between coldest and hottest core was never more that 4 degrees
- Case closed, air filters on all rads (also the top one)
The way I see it:
Overall I am very, very happy with the final setup (3 rads @ 5V). This is the first time I'm really satisfied with sound pattern and temps. SP120 @ 5V are humming nicely and quietly. Whatever I do they stay this way and temps are good even under have load and high CPU OC. This is f. beautiful :lol:
At the first glance the 3rd rad is not adding much (results are worse in fact, but within margin of error). I think that having 2SP120 running at 1350rpm instead of 950rpm plus the exhaust at full speed is making the difference.
Anyway - it looks like adding the 3rd rad is not a big improvement [with 2 blocks], but I have a setup ready for 2nd GPU and maybe haswell-e ^_^
Setting fans @ 12V improves CPU temps about 10 degrees, but I can tell you - it is noisy, and the noise is much worse than those fans on a bench. It is like f. jet plane taking off. You would not like to have such a setup, unless you are deaf.
Looking forward to your comments, I think those results are quite interesting
