If you are going to overclock a Palit GeForce 7600 GT Sonic or its analogs in earnest, you have to take care about proper cooling of the graphics processor, memory as well as power elements installed on the card. When I was checking out the results of the modifications I accidentally touched the card’s edge and nearly scorched my fingers! (It was before I installed a fan to blow at the reverse side of the PCB). So, if you are into serious overclocking, you must install heatsinks on the MOSFETs shown in the picture and, if possible, provide some air cooling for that section of the card.
Otherwise the components may overheat and fail. The high temperature of the PCB may have a negative effect on the overclockability of the memory chips, too.