Please help me how do i know if my old fan is compatible with my new pc

Muath_

Honorable
Oct 18, 2015
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10,780
I am new to fans. I have no idea how i know if my fan is good or not, if it goes in the motherboard, if it fits in my motherboard. etc. could you guys give me some info on them? im getting a new pc with these parts, i did not get them yet tho.

GPU- GTX 750ti SC
CPU- athlon x4 860k
RAM- single 1x8gb crucial ballistix
PSU- EVGA 600 B1 80+ BRONZE, 600W
HDD- 500GB
MOBO- gigabyte a68h motherboard

here is a picture of inside my pc (old parts, not my new pc)
http://imgur.com/L8HihER
http://imgur.com/deb8Qfe

The fan is that square thing. Will it fit in my new Mobo?
Here is a picture i took of SpeedFan the downloaded app to see my fan settings
http://imgur.com/g8KpNoo

help me out? thanks