*Does water cooling leak?
Very rarely with the H70
*Is high-end water cooling more efficient than top-tier air cooling?
Yes but the H70 is not as good as a good air cooler
*Will the Corsair H70 system fit in my CoolerMaster HAF 932 case?
*Is water cooling quieter than air cooling?
Normally but it depends n what fans you use
*What overclocking speeds can I reach with a Corsair H70 with safe temperatures?
Will vart from CPU to CPU even if they are the same models
*How often do you replace the water?
Never in a H70 every 6 months or so in a proper water cooling setup
*Would a chemical coolant be better than water?
Im no expert on this but I think distilled water + some biocide is best
*How do I know if my water cooling system is leaking or malfunctioning?
If the problem is not obvious then by hardware failure
What you need to know is the H70 is a zero maintenance sealed liquid cooler and is not like a proper water cooling setup in price, performance or how it needs to be installed or maintained. Good air coolers work better than the H70.
I'd have to agree with both on that. Good reply by simon12 on this one.
H70 is a decent option over an air cooler if you want to say you have a liquid cooler and don't mind the same temps as many air coolers...even for more money. It doesn't perform much better than most good air coolers and the best air coolers can often perform better. For the cost of an H70 plus good fans to make it perform well, you are well into the range of the XSPC Rasa RS240 kit around ~$130 (depending on fan choice) H70 is a high FPI 120mm rad which really needs high CFM/static pressure fans to work really well...need 2 in push/pull to maximize cooling ability.
FWIW, the H70 IS in fact, as good as "good" air coolers. The most expensive air coolers made will out perform the H70 in some circumstances. You can find independent reviews online to research this. In most cases, the H70 is within 3% - 5% of ANY air cooler made under equal testing circumstances.
And, you have the added benefit of the H70 not blocking memory slots like the "good" and great air coolers do. This is critical if you ever intend to run 4 memory modules that have tall heat spreaders.
They typically have pretty good test data and review info/comparisons. When it comes to people asking the generic 'what should I get' kinds of questions, I usually point them there. After they get some ideas with some knowledge to back their questions, usually others chime in with additional info.
Just wanted to show my support for the H70. I'm a long time user running an i7950 @ a modest 4ghz. Great little unit with no fuss or mess. idle temps around 30 degrees. One thing I do find is the rads tend to accumulate dust faster than other units I have tried due to the compact design.
All of those plus the consideration of poor case airflow. (which is the biggest issue surrounding the performance of air coolers...not the actual cooler, but the amount of cool air getting to it, and the amount of hot air getting away).
Sounds to me like you need to re-install paste and heatsink.
I usually recommend the Zalman Performa which costs under $45 anywhere and as far as i'm concerned a better value and cooler then the 9000 series.
That being said your cooler should perform far better then those numbers. http://www.xbitlabs.com/articles/coolers/display/arctic...