To start, I recommend you read Magetank's DDR4 OC guide here: https://www.overclock.net/forum/1805...ing-guide.html
This gives the basics of memory settings, "safe" voltage ranges, when to make tradeoffs between frequencies and timings and the general order of memory OC operations.
Once you have read Magetank's guide and have an idea of what to expect, I would look at the official DDR4 24/7 stability thread here: https://www.overclock.net/forum/5-in...ty-thread.html
It is very important to make sure you are properly testing for memory stability in order to prevent silent (or not so silent) memory corruption during your overclocking escapades. You can find all kinds of anecdotes, best practices and obscure tips in this thread and is well worth skimming through. Do note that memory overclocking can have many failure points (too high frequency, too tight timings, too much/not enough VDIMM/VCCSA/VCCIO for desired settings, not enough vCore for combined CPU Cache + DDR4 OC, etc) and it is vital to detect any instability BEFORE you get 30 settings deep into an overclocking spree and cannot figure out how to stabilise your OC.
If there is anything you should take away from here, it is "Test one thing at a time, prove stability before moving on and ALWAYS backup your data before you begin memory overclocking!"
Finally, I have found this thread on HWBot by [email protected]
very helpful for understanding relationships and general expectations for DDR4 memory settings: https://community.hwbot.org/topic/14...-motherboards/
. I recommend that you treat this guide as a checklist for overclocking your memory; change one group of settings at a time, check if it is stable and how the changes impact performance and adjust accordingly.
In general, I highly suggest you don't blindly copy-paste numbers into your bios for each setting because differences in motherboards, memory sticks/ICs and even CPU IMCs can dramatically change what settings are even bootable; let alone stable. I would always recommend you take a look at what your mobo + memory XMP settings are and change from there.
EDIT: How much time are you willing to invest in overclocking your RAM? Even ignoring the time it takes to stability test, RAM overclocking can be very finicky and require dozens of changes before you find something that works; even when just playing with frequency, primary timings and tRFC.