is overclocking the GPU worth it? if so, how do I do it and can I do it?

Yes, very much so ... unless a 31.4% increase in frame rates does tickle your interest .

Very easy with MSI Afterburner

perf_oc.gif


http://www.guru3d.com/articles_pages/gigabyte_geforce_gtx_980_ti_g1_gaming_soc_review,35.html

Read the page before proceeding but the important part is here:

With AfterBurner we applied the following settings:

Temp Target 85 Degrees C
CPU clock +150 MHz (from default 1152 MHz)
Mem clock +400 MHz (double datarate is 2x 400 MHz effective)
Voltage + 50Mv
FAN RPM 55% (recommended but a little more is noisy)

http://www.guru3d.com/files-details/msi-afterburner-beta-download.html
 


don't I need a CPU that can overclock?