First time overclocking need help

[Boyohan]

Hello

 

I am having a bit of trouble with finding a stable overclock.

My goal is a stable 5ghz OC.

 

My spec:

I5 8600K, GTX1080, Z370-H, 16GB 3200mhz, 970EVO 250GB, 2TB HDD, HX850i

 

Upgraded my PC in late 2017 with CPU, MB, RAM and about 4 months later I also added a GTX1080 (upgrade from my GTX960). I bought a new case in Dec 2018 because I wanted to OC my CPU so I added a H150i Pro with 12x 120mm fans (6 fans on AIO for push/pull config).

 

I have been reading a lot of guides on overclocking lately but if I am honest I am still a newbie when it comes to overclocking.

Before I started to do any OC i updated my BIOS but I am having some trouble finding stable settings.

 

My PC is "somewhat" stable with these settings:

AI OC tuner: XMP

BCLK: 100

Multicore: disabled

AVX Neg offset: 2

Sync All Cores + Ratio 49

CPU SVID: Disabled

CPU load-line calibration: 6

Long + Short Power limits: max

CPU core/cache limit: max

Manual CPU voltage: 1,375V

 

I started with a ratio of 48 and a CPU voltage of 1,300 but i could not get a stable Cinebench until I increased it the voltage to 1,330V.

At 4,9ghz it is stable around 1,375V

At 5,0ghz i cannot complete a cinebench test with 1,395V and i didn't want increase the voltage to 1,400 or more. 

 

At 4,9ghz with 1,375V i get a 2672 result on my Cinebench 20 test and 7984 on Time Spy.

At these settings everything seems to work fine and i could play games etc without any problems but when I tried to stress test it in Asus Realbench i got a message "instability detected".

I also tried to play around with the BLCK 99-102 with different ratios but this didn't seem to help.

 

I would still like to achieve 5ghz

Are there any problems with my bios settings ?

I know some ppl have said that Z370-H is not the best MB for overclocking, could my MB be causing problems ?

Or is it possible that I have been very unlucky in the silicone lottery since i know a lot of ppl get 5,0ghz without any problem.

 

Please help

 

P.S.

I thought i would add a pic of my build because... why not ?

(yes i know it is alot of RGB ) 

 

 

 

 

 

 

 

[Turtle Rig]

You will need to raise the voltage  higher if you want 5Ghz stable.  Or else take down your voltage and settle with 4.9Ghz,, I promise you wont see that 100Mhz difference in real world.

[Wormhole]

i wouldnt go over 1.35v, what cooler are you using?

[Boyohan]

@Wormhole Corsair H150i Pro (360mm AIO)

[Daniel644]

more voltage or messing with LLC is your best bet to get stable, but those Voltage numbers are already to high, your chip just ain't good enough for 5 Ghz, accept it and move on, i really wanted to do 4 Ghz on my 1700 but i'm sitting at 3.8 Ghz because thats all she's got before needing stupid level voltage increases.

 

My philosophy with Overclocking is to not try to reach a specific speed, and say fuck it to what it takes to get it there but to find the optimal speed for the CPU, you see how you had to jump from 1.33 Volts to 1.375 Volts to get 4.9 Ghz, in that scenario I would have gone with the 4.8 Ghz at 1.33 Volts because thats where the "Voltage Wall" (as I call it) is for your chip, the "Voltage Wall" is the point where it takes a MASSIVE increase in voltage to achieve that next step up in speed, on my 6700k thats the step from 4.5 Ghz to 4.6Ghz so that CPU is sitting at 4.5 Ghz.

[Wormhole]

2 minutes ago, Boyohan said:

@Wormhole Corsair H150i Pro (360mm AIO)

good AIO but the voltage is still too high settle for whatever is stable at 1.3 or 1.35v max

[Boyohan]

5 minutes ago, Daniel644 said:

more voltage or messing with LLC is your best bet to get stable, but those Voltage numbers are already to high, your chip just ain't good enough for 5 Ghz, accept it and move on, i really wanted to do 4 Ghz on my 1700 but i'm sitting at 3.8 Ghz because thats all she's got before needing stupid level voltage increases.

 

My philosophy with Overclocking is to not try to reach a specific speed, and say fuck it to what it takes to get it there but to find the optimal speed for the CPU, you see how you had to jump from 1.33 Volts to 1.375 Volts to get 4.9 Ghz, in that scenario I would have gone with the 4.8 Ghz at 1.33 Volts because thats where the "Voltage Wall" (as I call it) is for your chip, the "Voltage Wall" is the point where it takes a MASSIVE increase in voltage to achieve that next step up in speed, on my 6700k thats the step from 4.5 Ghz to 4.6Ghz so that CPU is sitting at 4.5 Ghz.

This is what I was thinking as well. 1,375V feels to me a bit high for a long sustainable OC and it might reduce my CPUs lifetime. It is most likely that I will not even notice a difference between 4,8-4,9ghz but 4,8 just feels a bit low to me.

[Daniel644]

1 minute ago, Boyohan said:

This is what I was thinking as well. 1,375V feels to me a bit high for a long sustainable OC and it might reduce my CPUs lifetime. It is most likely that I will not even notice a difference between 4,8-4,9ghz but 4,8 just feels a bit low to me.

in my book anything over 1.35v is to high for daily use. 1.35-1.4v just to see if you can, but never higher the 1.4 unless under liquid nitrogen or some crazy shit like that and thats not a daily driver CPU anymore after that, it's a competition CPU.

 

I feel you, when I did my 6700k I was reading where other guys where doing 4.6 to even as high as 4.8 and I just couldn't get close to those numbers, same with the Ryzen 1700 not even able to do 3.9 Ghz without unsafe voltages just to boot to windows. It sucks but it is what it is and I sit back and wait for next gen Ryzen so I can go for one of those rumored 5.1 Ghz Boost chips with stupid high core counts to replace that 6700k with, already got the fancy Trident Z Royal 3200 Mhz CL14 RAM to go with that new Ryzen when it comes.