Hi All, recently flashed my Pro to XT has been working fine but im lost in these threds and dont know what to do. Can someone help me decide?

1-Should i go back to pro and use ATI Overdrive?
2-Should i go back to a modded pro bios?
3-do nothing
4-Should i flash with a modded XT bios?

What diferrence does the mem or/and core volt do when played with?

If i'm suggested to use a modded pro bios,i would need a link for it

Thanks