When I researched and custom-built my PC back in
2009, I purchased the
Corsair H50. I am still running the same PC and I haven't had any problems with the water cooler...and there is zero maintenance required. Installation was quite easy since I picked a good case. It actually requires LESS room than an air-cooled solution. Why did I get the H50? Simple. I wanted a less-noisy system and this system was very attractive with the zero maintenance operation.
The last PC I had used a very LARGE air-cooled fan and it sounded like a jet plane taking off. Whenever playing games, it really revved up. It was very distracting. Now, my central air-conditioning for the house is louder than my PC!
I've read all sorts of articles and reviews on water systems and I never got a warm fuzzy feeling with any of them that required maintenance. Sure, you could use the kind of water that won't cause electrical shorts if pored onto a circuit-board...but over time, that water changes and can eventually conduct electricity...thus removing your level of comfort for using such water with a system that might spring a leak.
Based on the reviews I read at the time and my personal experience with the H50, I'd recommend it to anyone wanting a high-performance PC without the high-pitch of fans.
I've seen the
Aquariam PC (mineral oil-submerged), however, that just seems too gimmicky. Messing with components, upgrades and whatnot would be....well....messy. The nice thing with mineral oil is that it takes a LONG time for it to build up heat and it keeps hotspots from forming. However, without an effective cooling option, you would have to turn the computer off for a while. The advantage turns into disadvantage because it also takes a LONG time for the heat to dissipate. That is why radiators are necessary to keep the running. Take a look at the radiator / fan system on the Aquarium V3. Yikes! Back to a bunch of fans. But if they use large diameter fans, they don't have to spin as fast and thus are not as loud as the smaller fans.
Wow, getting side-tracked. /end
LHammonds