i picked the last option, this 5850 runs 850/1200 24/7 and i never get any of this, my preferred driver is ATI_8.70_RC2_Vista_Win7_Jan14. its the best since 9.12 hotfix for me and i have used EVERY beta out there.
I use the msi 5850 bios and its a dream, i like the card better than the 5870 i had.