I'll try to keep this as short as I can and will answer any questions you might have.
Bought my first gaming PC two years ago. It was good enough until I received Watchdogs. My CPU and RAM can't handle it and seeing as my CPU is a nugget of crap, I thought I'd attempt my first build.
I understand that a lot of models are only slightly better than their predecessor and those models may seem like a waste of money to some. But the current PC I have is so behind, pretty much anything will be significantly better.
My budget is around $1,500 but I don't want something that's going to eat my power bill.
Case - Thermaltake v4 Black Edition
CPU - Intel Pentium G840 @ 2.80GHz
Motherboard - ASUS P8H61
RAM - 2x2GB G.Skill Ripjaws
Hard Drive - 500GB Seagate Barracuda
I have no idea what Graphics Card I have
What I'm considering for new build:
Case - CM Storm Scout 2 Advanced
CPU - Intel Core i5 4460
Motherboard - MSI Z97 G45
RAM - Corsair 2x4GB DDR3
Hard Drive - WD Black 2TB
Graphics Card - ??
As far as storage goes just get the ssd for your OS and games an use your old 500 hdd for movies, music w/e
The 4670k is the best bang for your buck as far as gaming cpu goes. ts unlocked so many yars down the road when it does start to gey outdated you can OC and squeeze some life out of it. i forgot to incluse a aftermarket cpu cooler but just get a 212evo for $30. ir if you want to spring for something better get a noctua
the 770 will play every game out right now on Ultra. if you want a bit more performance though you can go 780 or r9 290
I hope that provided the answers you were looking for. any questions?
The above-mentioned builds have well-chosen parts so I won't add my take on it anymore. I will have to highlight though my opinion regarding the video card. Seeing as that you purchased Watch Dogs and have a $1,500 budget, I'm going to assume you want to play it at smooth framerates and the best detail settings.
If that is the case, then better go with an Nvidia card like the 780ti. AMD cards can offer better prices for the same general performance, but I recommend Nvidia since Watch Dogs in its current state works and plays better with Nvidia hardware.