all-core OC probably is not the best way to go for your scenario and best to leave "stock" (just turn on PBO and all those other knobs, but leave multiplier and volts alone). make sure to max out your FCLK 1:1 with your RAM. run 3800MHz CL14 and 1900MHz FCLK if you can. if you really want to min/max your CPU performance, you will need to do per-CCX overclocking. you might have a CCX that can run 4.55GHz "all core" stable just fine, but other CCX's might suck and only do 4.2GHz max, so you would be stuck with a true all core oc of 4.2GHz. doign a per-ccx OC would bring up performance, especially in single thread.
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