the gc usually have a crystal sit next to the gpu.

is there anyone tried before to oc the gc by changing the crystal frequency?

theoretically, there is engineering margin design, but really don't know how much frequency can clock more with this crystal frequency.

or the idea is "fake"?

CRYSTAL is a component which generate the frequency for the gpu to operate or else no reference clock to coordinate the tasks and instruction and logic sequence among the IC on the pcb.

it will usually parallel with 2 same value SMD capacitors.
if no measurement or waveforms detected at the crystal terminals, it can certify immediately the crystal death and gpu and whole gc will not work at all.

crystal is a very common component found in many electronic circuits.

HERE ARE SOME EXAMPLES OF CRYSTAL



This post has been edited by ectt: Aug 18 2013, 01:26 AM

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in most of the electronic design, the frequency provided by the crystal is the source of frequency to be "multiplying" or "dividing" before used in different "parts" of the circuit. yes, some circuit may directly use the crystal frequency.
for example, the frequency generated by the crystal beside the south bridge on a mobo will be multiplied and divided to frequencies values for different peripherals.

OC usually is to clock up the operation of the instruction execution, theoretically, replace it a crystal with proper frequency choices and apply it to the parts of the gc which will not harm or affect the proper operation under engineering design margin may be a possible way to seek fun in oc.

once met a technician who replaced the crystal with higher frequency to the gc but it could work and no harm to the gc, but no idea the model of the gc model no. take your own risk if you try out, no guarantee and responsibility given here

my2cents in electronic