Looking for a REALLY good PC build

[Wahw11]

I am new to pc building and am currently choosing parts to build a gaming pc. So far, I have chosen the Intel i7-4790K 4.40GHz 8MB LGA 1150 CPU and the GTX 980TI GPU or the GTX TITAN X GPU.

I am looking for a PC that will be able to run the most demanding games at least at 60 FPS in full HD.

I have the following questions:

-Should I get a better CPU?
-GTX TITAN X or GTX 980TI?
-What power supply supports the TITAN or the 980TI and the i7-4790K?
-Do I need more than 8GB of RAM? What do you recommend?
-What is overclocking?
-What motherboard supports these parts? Do all mother boards support them? What is the best motherboard out there for gaming?
-What case size? How can I know it fits all of the above parts?

I am really new to pc building, Sorry for so many questions.

 

[dasulman]

what's your budget? what country? what peripherals do you need? do you need an operating system?
cpus could potentially be better but for 99.9% of people its fine. Depending on what country you're in it might be easier / cheaper to get skylake.
980Ti is better bang for the buck.
980Ti = 550W PSU; SLI 850W.
8GB is standard; but 16GB is growing in popularity due to ram demands; if you've got the money for 16 go for it.
overclocking is running more voltage through your CPU to get higher clock speed (GHz) for better performance. a good overclock is normally by around 20% and normally requires a better CPU cooler and case fan set up.
for I7 4790k the MSI Z97 Gaming 5 is a solid choice.
Case requirements are based on motherboard size - most are either ATX or micro ATX and are supported by almost all cases apart from mini towers or big bespoke one's that very few people buy. the Corsair 100r-900r are a good bet, nzxt make good cases, phanteks enthoo pro and lux cases are also great.
By standard the case will fit almost all parts. you only have to check for CPU cooler height clearance (there's only 1 CPU cooler worth using) and fan slot layout if you decide to go water cooling.

 

[Wahw11]

Ok, so I just changed my mind a bit. I am going to get a GTX 970 GPU instead. I realised that the 980TI is way too expensive.
I am not sure what my budget is. I live in Brazil.
I found a guy that is selling an i7 950 for around $175. Is this CPU good for gaming?
I´ll probably get 16GB.
Thank you for helping.

 

[dfk]

i7 950 is on an older 1366 platform, its motherboards already phased out, no point getting that.

You could get the i7 4790K if you're really into OCing. As explained by Dasulman, OCing would require more budget spent on adequate cooling / Z97 motherboard. You could also go for locked Skylake if not OCing.

If your budget is tight, a Xeon E3-1231V3 would be better because it's an i7 (quad cores, 8 threads) at i5 price. It does not have integrated graphics but since you have a GPU it doesnt really matter. A GA-B85M-D3H rev 2 / ASRock H97 PRO4 ATX motherboard would be good enough for locked cores. It'll combo well with the GTX 970.

Also get a good/reputable PSU for the rig.
http://www.tomshardware.com/forum/id-2547993/psu-tier-list.html

For cases it's a subjective thing, also depends on your budget. You can check the length of the GPU, PSU and height of your CPU cooler to take into consideration when choosing a case. A mid tower case would fit MSI Z97 Gaming 5 (ATX).