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Originally Posted by fhorst
Overkill? no way! I run my fans at 7v, to keep the noise down (PAPST), so the air flow is not that much. only way to get water temps as close to ambient as possible, is to increase airflow and/or cooling surface. As long as the water temp is above ambient, it's never overkill. every degree you get out of the water, will give you lower CPU temps. As simple as that.
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or to increase the water flow..... higher flow helps the rad(s) as well as the blocks...... (though not as much)
plus it'd be worth trading a 1 degree increase in water temp, for a 1.5 degree improvement in (cpu temp - water temp)
maybe it'd be worth loosing a rad (bix?) altogether - then possibly the other fans could be a bit higher for the same noise level...
i guess you'd really need accurate water temp and cpu temp measures to predict the best move - bios temps aren't accurate enough to predict what part of your setup is likely to be the best target for the next half a degree...
just a thought but what is the airflow like for these rads? i.e. where are they and are they using outside air or case air? shrouds? fans pusing/pulling?