Hello! At the time I'm using the Intel extreme tunning app to undervolt my pc. It is set to -0.130V for core, cache and graphics it works without failures. Previously I used MSI afterburner to lower frequencies in general, but I would like to know if modifying the frequency curve in each voltage variation I would obtain better results in terms of temperature and fps. I hope you can tell me about your experiences and inform me on how to get better results. Regards!
Setting a custom curve for the GPU will give you better framerates and/or temperatures, depending on what you're aiming. You can have both if you have enough time and patience to play around with it.
In my case (GL502VSK, gtx1070+7700hq), it went from 1580mhz/1.080mv at 83c, to 1810mhz/810mv at 75c (both at 100% load). Huge improvement in both fps and temperature. It takes a LOT of trial and error to find the sweet spot.