Plus: can be quieter, better heat rejection from cooled components, may allow for a bigger overcolock
Minus: Cost, will destroy your PC if done badly, 'complete' system including graphics cards and chipset needed for max benefit
Personally, i only see the point of watercooling for noise reduction. The amount of additional overclock you could get from air to liquid cooling (and therefore the performance gain) could end up be nothing.
Very efficient and works very well, if you do it right and get good components. Stay away from Thermaltake, Zalman and Koolance if you can.
Those should get you started. Don't expect it to be cheap for the results you want...$250-$300 is a good starting point for quality components. If you don't want to shell out the cash, then evongugg is right...air coolers would be better for less cost.
I have a Thermaltake Armor LCS VE200bws, Aquabay m2 and a Extreme spirit ll northbridge cooler and my q6600 is running at 3.6GHz,with realtemp my temps are 25,25,23,23 no load and 65,65,62,62 load. load is running intelburn test v1.9
Like someon already note. IF YOU GO EXTREME OR REALLY HIGH oc, it's worth it. For the 85% of the other people my answer is no. If you want to get a projet like mod your case, go wc add cathode or bling bling yeah it's worth it. For sound reducing, get damper product noctua fan add 7 of thoses and it will whisper too your ear. I have a tj-09 and 5 fans , 2 top on a fan controller, 1 intake , 1 exhaust, I add one with a duch on the side panel all noctua fan a 7 volt temp inside the case 24c. . When I start my pc listen to music the pc at less then 3 feet, i heard nothing.
Really? I get more compliments from my rads and side tanks at LANs than anyone, and most guys have at least ball-park hardware. Its not like a quad core and 4gb of RAM is that big of deal anymore, but anyone can snap on a CPU fan with a light and call it a day. Real watercooling is an art form and an expression of who you are technically as a DIY PC builder. It is by far more a hobbyist mindset than anything, but it is well worth it if you really enjoy standing out from a crowd and being proud of your work. There is something to be said for sleek and functional performance as opposed to flashy lights and case windows.