Can someone give me their opinion on air vs. liquid cooling? I'm thinking about switching the liquid but I'm not sure about the cost or hassle involved.
Also, does it matter in particular whether I have an i5 4690K or i7 4790K processor? There's a steep 100 dollar difference between the two and I want to know if I'm getting something thats not needed.
I have only ever done air cooling with aftermarket heat-sinks, but if you want to overclock your processor I would have to recommend water cooling (I put a fair amount of research into water cooling for my next build), plus it just looks more kick ass imo. If you choose water cooling you have two routes:
Closed Loop: Very simple and comes pretty much pre-assembled. Examples are the
NZXT Kraken or
Corsair Hydro Series. I feel like the Corsair gets more love than the Kraken, but no matter what a closed loop CPU cooler will set you back around $100. Closed loops are what most people use and what I'd recommend for anyone starting water cooling.
Custom Loop: Can be as complex or as simple as you want, you control your pumps, radiators, fans, ect. The whole point of a custom loop is for customization, but it can also be tricky to assemble for those with minimal experience.
When it comes to water cooling your CPU the more surface area of your radiator the better, but you don't need to go nuts if you planing on a fairly low key overclock or just for aesthetic purposes. If you get a closed loop just make sure that its compatible with your motherboard socket type such as LGA 1150, usually they are modular and you can adjust it based on your socket type.
As for your i5 vs i7 its probably more beneficial to go with the i5 and invest the saved money in a better GPU as that will present a bottleneck long before the CPU does. If you can swing the i7 by all means go for it, but at this point CPU tech isn't whats holding most people back.
If you don't plan on overclocking an
aftermarket heat-sink is a perfectly viable option as well as a bit cheaper, but it will be louder.