I built my first computer roughly 6 months ago and I just did a barebones build. I accidentally bought an overclocking cpu but I have been using an Intel stock cooler, now that I've been in the game for a little bit i figure, hey, go big or go home. I am also going to water cool my GPU because why not. I have an nVidia GeForce gtx 750 ti 2GB Ftw acx graphics card, I was wondering if I could get an AIO for a single loop GPU/CPU or if that would be custom, either way I need to know a minimum and recommended spending range. I don't really have a budget, since it isn't time sensitive I'll just save up if I need to. Thanks!
1) Now what do you mean by "overclocking CPU." This traditionally means something with either k or x designation (from Intel) or almost anything from AMD. It's been stretched recently to include the Pentium Anniversary edition. Even assuming a few things (Intel, and the like), that gives you no idea what kind of cooling you'll need (new enthusiast platform, mainstream platform, and what generation).
2) You've got a GPU that costs just over $100 in the US. You are going to try and water cool that? The cost to performance would be a joke, especially considering water blocks (if even available) would likely cost almost as much as that card.
3) Scale. I used a one word response here because you're going from a beginner's build up to an experienced build. You likely don't have the skills. This isn't meant to discourage, but destroying a system because of a water leak makes everyone a slight bit touchy. I don't want anyone to be turned off the hobby because their first experience was terrible and a huge money pit.
Now that we've got the preliminaries out of the way, allow me to give you some advice. Buy a high end air cooler. It's just about as effective as an AIO, and they generally are a small fraction of the price. That will put you miles ahead of the stock coolers, that aren't fit to use as doorstops.
Once you've got the air cooler, play around with overclocking. Get that CPU to a stable overclock, then play around with it to improve the thing. A decent air cooler can cover everything but aggressive overclocks and high end systems. If you chose a 750 video card you're not really capable of either.
Once you've got the overclock at its maximum, likely at a thermal limit, think about buying an AIO. Unless you're doing some heavy computing, it's unlikely you'll need to overclock more than an air cooler can provide. If you do need it, the AIO is a good and idiot proof system. Remember, everyone's an idiot until they've made mistakes and discovered what not to do.
Now that your CPU is setup, play with the GPU. Honestly, the 750 doesn't have a lot of overclocking potential (from my limited experience). What it does well is drop in, stay relatively cool, and work with little intervention.
If you did want to do a custom loop you're looking at $50-150 for the pump, $60-150 for the block, $40-200 for the radiator, $20-80 for the reservoir, and another $10-30 for the tubing. Depending upon the tubing, you've also got to invest into fittings, which are anywhere from a few cents (barbs and ratchet clamps), to $10 a piece (threaded compression fittings). I'd recommend that if you really want to get some experience you buy one of the introductory kits, to make sure you've got everything for a CPU loop. Again, that GPU just is not worth the effort.