i was reading reviews on newegg about the GIGABYTE GA-965P-DS3 and how everyone was complaining about having only 1 case fan to connect to the mobo. for me that is a problem considering im getting the Antec P182 case that comes with 3 120mm fans already and i plan on adding another one in the front and my PSU ( Corsair 520w ) has a 120mm fan on top. how am i gonna connect all of these?

and i think my psu has 24pin connecters n the mobo has 20ping atx connectors

You can connect your fans directly to the PSU, just can't control the speeds in the bios.

Deuce is right - 3pin to 4pin adaptors are cheap if you need them.
 
The DS3 has a 24 pin power connector - I have the same mobo and a Corsair HX520, and they work fine together. My board's revision 3.3 - not sure if earlier revisions have 20 pin atx, but I highly doubt it.

Arctic Cooling has a line of PWM-controlled fans that can daisy-chain the control signal.  Though I don't know if they're available in the US yet.