Liquid Cooling really isn't all that different from traditional Air cooling.
There is this misconception that it can magically cool your system no matter what.
It cant.
You can not go beyond Ambient Temperatures, without some kind of compression cooling system, which is a whole nother ball of bees best left to professionals and the insane.
So if your room is 80 Deg F, You can never get your system below that on air or water without some extreme shenanigans.
A water cooling rig can be prohibitively expensive, because you have all kinds of fittings and hardware you have to buy to make it work. It also has a lot of maintenance you need to do year round to ensure the loop works correctly, and when it breaks, it can be catastrophic.
This is why things like the AIO water coolers that different MFG's put out, are more popular than building a custom loop.
They are as simple as normal Air coolers to install, no maintenance required, and give you a significant fraction of the performance of a custom loop.
What's the advantage to using a Water system at all?
Your moving the heat up off the Die, and dissipating it into the air more efficiently than a traditional Air cooler.
All I know is the absolute BEST cooled (without resorting to liquid-hydrogen, which I have seen used on some supercomputers) computer I've ever seen was built with all the electronics exposed,
inside a fish-tank filled with mineral oil (everything was connected together before the mineral oil was added).
This results in essentially perfect instantaneous heat dispersion. The only crevat is the system must be kept COMPLETELY dust free. Not a spec of dust on any of the components before immersion in the oil, and no dust can get into the oil once the system is completed.
It's not good for if you plan overclocking, since the oil shouldn't get hotter than 50
o C (122
o F) and the radiators typically can't keep up with an overclocked CPU/GPU. But if you don't plan on overclocking then you're looking at a computer with decades of lifespan, rather than years (barring mechanical failure).
Oh, and my CPU fan fell off a month or two ago, but that was just because I didn't screw it in right back in October. It could happen to anyone and I'm frankly impressed it stayed on that long.

I just stuck it back on with some leftover thermal paste and twisted the fasteners to the
right this time, problem solved.
Or was it left...?
Please tell me you scraped the old thermal paste off before applying the new thermal paste...
If you didn't then
right now turn off your computer, open it up, pull the CPU fan off, scrape off ALL of the paste currently on there (use a q-tip and/or cotton ball and 90% rubbing alcohol, and a NEW razor blade[male SURE it's a perfectly straight blade with no nicks, and be VERY careful not to leave any scratches] to remove the old paste), and re-apply some new paste.
If you just put a new dab on and re-applied the CPU fan you are 100% guaranteed to have air bubbles in there, and those will kill the Thermo-conductivity of the paste.
As a note, when applying the thermal paste, place a dab in the center of the CPU and then place the CPU fan/heat sink, allowing the Heat sink to spread the paste out. Spreading the paste out with a credit card or something similar is another way to introduce air bubbles (and I WILL prove this if anyone challenges me on this; better yet, I'll get you to prove this to yourselves, with SCIENCE!!! *laughs maniacally*)
...shit. I have a copy of Windows 7 but it's on a disc and I don't have an optic drive.
Can a Windows installation disc be loaded onto an external hard drive and booted from there, or would a new system's USB ports not work without drivers installed?
http://www.microsoft.com/en-us/download/windows-usb-dvd-download-tool
That right there is everything you need, well baring a computer
with an optical drive and a USB port.
Basically:
-Install that little tool on the computer with the optical drive.
-Pop the Win 7 install disk into the optical drive.
-Pop a 4 GB or larger flash drive in the USB port. (it will be formatted, so nothing on there you want to keep)
-Run the tool. Point it at the USB drive, and the optical drive, and sStart the program.
After a few minutes the program will finish, and your flash drive will now be a bootable Windows install disk (of whichever version the disk was). As a bonus, install from a flash drive is considerably faster than installing from the disk.
There will be a slight issue if your disk is x64 and the computer you're creating the flash drive installer on is x86, or visa-versa; but this is easily fixed, just a matter of putting a specific file in the tool's root folder before running it. If this is an issue with you, just say so and I'll dig up a link to the file you need (not that hard to find if you know what you're looking for, it's not exactly a rare problem).
Pretty much all new motherboards natively support booting from USB (even without a HDD attached), and most older ones will support it with a firmware update.
As to silver-based thermal paste (and never bother with a metallic thermal paste that isn't silver). It's one of the best thermal pastes out there, although there
are better ones, but the thing is you should only use it if you KNOW what you're doing.
Put 1 ml too much on, and it will bleed over the edges of the CPU and probably get into the sockets, and even if it doesn't it could short the connections going
into the sockets. Basically, the tiniest bit too much and you fry your CPU, and probably your MB as well. A drop falling loosely on your MB is BAD as well.
Alternate, put to little on, and you don't get enough contact between the CPU and the heatsink, overheating your CPU.
If you're just a hobbyist, or working off of youtube videos, then stay away from silver-based thermal paste.
http://www.walmart.com/ip/15907612?...81550832&wl4=&wl5=pla&wl6=78811124072&veh=sem
This thermal paste works well if you plan on overclocking, and it relatively cheap.