As has been said though, overclocking works differently,. The card adjusts clocks dynamically, and does it very well. This means that your single-core boost clock can be much higher than the all core load boost. And it also saves on energy usage when there is no load on any or most cores. This may sound similar to Intel energy-saving and boost clock features, but it is much much more pronounced because these features were not added later but are an integral part of the full chip design.
So: do not set a fixed voltage and clock speed for all cores. You’re better off keeping it stock then.
What should you do?
Raise power limits to the levels your quality motherboard is capable of. This is just “flicking a switch” in the BIOS screen: “set PBO Limits to Motherboard” or similar.
That likely gets you 95% of the way to your optimal chip performance, at 1% of the time investment. If you do want to continue, you can Google “PBO overclocking” and “curve optimizer”.
What those mean conceptually, is this:
The automatic algorithm for determining clock speed (and voltage) based on load follows a curve: it moves up the curve when load for a core is increased, increasing clock speed, and also adjusting voltage as dictated by the curve.
The 2 things you can change here, are:
- You can increase the maximum allowed clock speed (PBO boost clock). This will make clock speed increase, until the power/temperature limits are reached again, and then the CPU won’t boost higher, no matter how high you set this limit. It simply won’t reach it.
- Then, you can “Shift the curve”, to make the CPU require less voltage at a given clock speed. Effectively undervolting, this reduces the power usage at each clock speed, and allows your cores to reach higher clocks (if the limit allows it) before the power limits are reached.
However, nr.2 here should be done per core, and is very hard to stability test. Not recommended unless you really like overclocking. Also, look up some guides on reddit on stability testing and consider using this tool and the reddit post mentioned in the readme.
Again, only if you like overclocking. Otherwise, just set PBO limits to motherboard and call it a day.