GTX 680 bios hack or other cool tricks?

So I just got a GTX 680 and i read that you can bios hack it to a GTX 770 but I also read that it can brick/kill your GPU so I was wondering is there any other cool tricks?

It won't kill your GPU. Well... It might, but you can always revive it in a friend's PC, or with a second GPU. You really can't damage it irreparably by swapping a firmware. Worst cast is that you have to solder (or tape) a wire to some pins on the EEPROM to make it writeable in the OS, and then remove the wire from the ROM chip while the PC is on, and reflash the card.

ohh well i have 3 backup Gpu so maybe I should try and see is it worth anyway?