Heatsink Help (and Cable Question)

[flavoi]

I am building a computer for the first time, and I do not know how to choose the right heatsink.
My processor does not come with a heatsink. I have heard any heatsink i buy should be better then stock, but i have no stock... I need it to be as cheap as possible, so i found this. i just dont know how to tell if it would work right, fit right, or keep my cpu cool enough. A few other parts: Mobo, case

Anything else, ill be glad to add.
Thanks in advance.

 

[flavoi]

Ok, i built it. Everything works fine. My one (or 2) question is (are)
Where should i add another fan? There are 2 side slots, and a back one as well. My case only has one, and fans are cheap, so thats probably a good upgrade.
Second, i use speed fan to display my temps with Rainmeter. It says my GPU is 9 c, and the driver says 30 c. Is there something i can do? (idle temps). I dont know how to test the cpu/hdd tests while windows runs, so they may be wrong.