Help building a gaming PC for $1000

I am looking to build a new gaming computer rather than buying one, but I have no idea on what I should be looking for.

I have a budget of about $1200, which I've heard can get a pretty decent system.

Should I get an i7 core? Or would I be better getting an i5 and spending the extra on a better graphics card?

I know nothing about what I need in terms of things like motherboards, cases, power supply, cooling systems or optical drives. What kinds of things should I be looking at?


Approximate Purchase Date: Probably sometime between June and August

Budget Range: $1000-$1200

System Usage from Most to Least Important: Mostly gaming, possibly some light video editing

Parts Not Required: Gonna require new stuff for everything.

Preferred Website(s) for Parts: No preferences

Country: United States/China (Live in China but go back to the US frequently)

Parts Preferences: No idea, whatever gives me the best,

Overclocking: Yes

SLI or Crossfire: I don't know what either of those are.

Monitor Resolution: 1920x1080