ok i bought this it is not the oc edition
its the ghz edition so can it be overclocked?
*epic facepalm*
The "GHz Edition" is a moniker added to all AMD GPU's who's stock core speed is 1 GHz or higher, which includes the 7770, 7870, and 7970 (GHz Edition; there is a non-GHz edition). Any OC edition cards (can have different marketing terms, such as Turbo if it's an HIS card) are from the 3rd party manufacturers (such as Sapphire) who include an overclock out of the box that is under warranty.
However, just about all GPU's can overclock, regardless if they are GHz Edition, OC edition, etc, or not.
As long as it isn't more expenisve then the 7870 XT then you did okay.