My i7-7700k won't overclock to anything higher than 4.5ghz

[13128vu]

My specs
motherboard: Msi Z270 sli plus
Cpu: i7-7700k oc (4.5)
Ram: 64gb ddr4 oc (3000)
Gpu: Gtx 1080 ti
Psu: 1000 watt

My Bios Settings:
https://ibb.co/bbVRZpj
https://ibb.co/WfYF9L8
https://ibb.co/WBF2jmk
https://ibb.co/1zXtKPH

I seen lots of people with the same cpu and motherboard and overclock their cpu to 4.8ghz and have it boot to windows and run benchmarks with good temps. Then I try, I changed the settings around making the cpu ratio x46, x47, and x48 with core voltage at 1.280. Only x46 was able to boot and run a benchmark, then after an hour it crashed and I had to lower it back. both x47 and x48 weren't able to boot they either freeze at the when loading windows or windows 10 just says something is wrong with your pc and it gave me that blue screen with the repair button. I tried so many things I turn up the core voltage slowly and it reached to 1.4 with no sign of improvement, still doesn't boot, I changed the core/gt voltage mode Auto, Adaptive, Override, I changed the cpu loadline calibration control and cpu gt loadline calibration control from mode 1 to mode 2 and 3. I don't know what to do I'm really new to overclocking please help me.

Thank you

 

[13128vu]

No. You don't lower the voltage and waste time with a 2 hour benchmark.
read carefully.

I said if it passes the 15 minute test, lower the voltage by that small increment and run another 15 minute test and keep doing this until it fails.
then when it fails, bring it back up an increment THEN run a 2 hour stress to make sure that voltage is good.

If it fails a to reach 2 hours then bump it back up another increment until you pass the 2 hour heat test. Then proceed to do a full CPU stress test for 6-8 hours.

Doing a 2 hour test every incremental decrease in voltage will just result in you wasting a lot of time.

yeah that's what I did, but it failed on 4.7ghz at 1.4v only ran for 12 minutes. So now i'm on back 4.6ghz on 1.32, I guess 4.6ghz is as far as I go.

 

[QwerkyPengwen]

Guess so.
But hey, at least you are getting faster than turbo speed on all of the cores.
That's pretty good compared to stock settings.

And 4.6Ghz is totally fine to run at.
I run my 6700K at 4.6Ghz and it handles everything I throw at it just fine.
I don't get any bottlenecking in the latest AAA titles at 1440p on my 1080Ti.
(can run 4.7 but temps are warmer than I want them to be. Still within safe operation, just more than I want them to be)

 

[13128vu]

Thank you everyone for the help.