There are many avid Overclockers and some of the best are here on this Forum. How you go about developing your Overclocking skills is to do the hard yards and research.
No one is going to give you their Hardware or Bios configurations with an expected fix. Every system is different depending on Case config, CPU,PSU, RAM, cooling system etc.
If the question is asked correctly and it attracts one of the more senior Overclockers then you may get a recommendation that works for you.
Overclocking starts with an understanding of your Bios and making minor changes to help stabilize the system under load. You DO NOT make arbitrary changes to settings without knowing the consequence of those changes. You start with your CPU in default mode and stress testing the system to obtain a base line for Overclocking. This is to determine how your system is behaving temperature wise and to check PSU power delivery.
I noticed immediately that in default mode your CPU voltage is excessive at 1.517V. You change this in Bios by selecting CPU core voltage to manual. You are then able to override or offset your core voltage. Best is to first Override and set Core voltage an initial low voltage say 1.3~V and test to see if the system boots Ok. If not then increase core voltage in small jumps of .02V till stable and the system boots. A stress test is done to again check on your temperatures and power delivery and this is done at each phase of the Overclock.
If OK and the system is stable then by observing results of your stress test you can make your first Overclock and this should be done in stages of say 200MHz with a slight increase in core voltage to remain stable. It's then a matter of rinse and repeat till you are satisfied with your efforts or reach a WALL where you can't climb or go around no matter what you do.
There are some very good third party apps to help get your max Overclock: ROG CPUz, AIDA64 and Realbench for stress testing.
This is just the start with simple Overclocking. To obtain your MAX Overclock, depends now on trial and error and such things as LLC (Load Line Calibration) (+ - Offsets) to control minor voltage fluctuations when under load.
BTW: Am I wrong about memory? NO.
When DIMMs are manufactured they are binned in a selective process to determine what stable frequency they can maintain and to match modules in pairs or quads.
When tested, if a module can attain a stable frequency of 4000MHz then it would be matched and sold as a tested kit. You pay more for high frequency RAM and the higher they bin then the more you pay.
DIMMs with Samsung B-Die chips at 3200Mhz seem to be a sweet spot with R 2700X (WHEN CONFIGURED CORRECTLY)
As 3000MHz is considered OC RAM then they will default to a lower frequency as determined by your CMOS during POST. It is then up to you to determine their best achievable frequency with changes to Primary (and sometimes secondary) Timings and Dram voltage in "DRAM Timing control" within Bios.
I notice you have attracted/hijacked Gupsterg in another thread. Listen wisely, he has a lot of good things to help you.
I hope this introduction is helpful.
We owe our existence to the scum of the earth, Cyanobacteria
My System Specs:
MB:ASUS ROG Crosshair VII Hero/WiFi GPU:EVGA GTX 1080 sc PSU:Corsair AX-1200i
CPU:AMD R7 2700X Cooler: Corsair Hydro H115i Case: Corsair Carbide 780t
Memory:G.Skill TridentZ F4-3200C14D-16GTZR SSD:Samsung 500GB 960 EVO M.2
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