Overclocking i7-8700K numbers

[Cheesy86]

Hello my awesome people. Back at it again. Just trying to learn as much as I can here from the fountain of knowledge that you all provide. Currently trying to OC my 8700k to 4.8 GHZ and make my way up. I wanted to see what you guys opinions are on temps, voltage, VCCIO and VCCSA. I ran a test last night on RealBench for 1 hr with the following specs and it passed:

OC: 4.8 GHZ

Package Temps: 73° C

VCore: 1.26

VCCIO: 1.1

VCCSA: 1.1

Also ran a test on Cinebench and went from 1301 (stock) to 1559. That's an 83% increase, pretty happy. The system is getting cooled by the Corsair H100i V2.

What do you guys think? I would like to try and stick around these numbers, maybe lower temps a bit if possible w/o delidding and I am open to any recommendations and thoughts you all have.

[Cheesy86]

All righty then... This is what I got so far. I am including the screenshots of my BIOS so you can see what I have changed and that I am following you guys advice. I also added the changes that you recommended Nate and ran Realbench Benchmark Test. This is what I got. What are you guys thoughts and suggestions to continue my OC and try to hit 5GHZ with the equipment I have?

[Cheesy86]

Ok guys so its 2:20am in long beach and I figured id do one more test before my pregnant wife gets us and kills me. J/K. I raised the core ratio from 48-49 and testes with the settings that I had in my previous post. Didn't work, BSOD. So, went back into the BIOS and did the following changes:

Vcore changed from 1.32 to 1.345V

Offset the Voltage to .040

CPU COre/Cache Current Limit Max from Auto to 255.50

Long and Short Duration Package Power Limit from Auto to 4095.

Also ran Realbench benchmark and passed. Previous settings at 1.32 would start the benchmark but would BSOD into it. Could really use some guidance on next steps or suggestions. What are you guys thoughts on my settings? ANy concerns or things you guys want me to try? Really appreciate your patience and knowledge.

[Nate152]

Thank you for the update and screenshots.

It looks like you got 4.9GHz dialed in with 1.344v.

Intel says absolute max temp is 90c and 85c is fine for 24/7, you have a little more headroom if you want to try for 5.0GHz.

You can leave it at 4.9GHz or shoot for 5.0GHz, since you need 1.344v for 4.9GHz, I suspect you'll need 1.40ishv for 5.0GHz.

The voltage still looks off to me, what we want to do is get the Additional Turbo Mode CPU Core Voltage Override the same as the Maximum Vcore. Try setting Additional Turbo Mode CPU Core Voltage Override to 1.345v with a negative offset of -0.090v, is Maximum Vcore still showing 1.344v?

Setting CPU VCCIO and CPU System Agent voltages to 1.10v - 1.15v should lower temps a few degrees, I see they're on auto.

[Cheesy86]

Hey Nate,

Going to be running some errands today as it is the only free time I have with my wife. I ran one more test with the settings that you recoommended in your previous post and unfortunately I got the BSOD. I changed the voltage to 1.345 with an offset of .09 and it started the realbench benchmark test but it crashed right after.

Really, really trying my best to learn from you guys and I am dedicated to make this work. I went ahead and made a small change to your suggestions and I left the voltage at 1.345 but I changed the offset to -.04. I ran the benchmark test and it passed without any hiccups.

At this point I am really confused buddy. If you check my attachment it says that its has a min of 1.296V and max of 1.328V for the vcore. Why cant I be stable with 1.32V for 4.9GHZ if HWinfo is reporting that the max voltage used is 1.316V? Hopefully you can shed some light on this matter ma dude.

Going to be out for a few hours but when I get back Im jumping back on this. Thank you again for the guidance. I can continue to reply with my phone just cant run any tests until I get back.

[NemesisChild]

It's best to dial in your CPU OC with manual voltage. Once deemed stable, you can convert to adaptive mode.

The offset/adaptive settings can be tricky, it usually takes a fair amount of time (and patience) to dial in.

It looks like to me that you're getting some Vdrop, so again, I suggest starting with manual Vcore settings and LLC 5 or 6.

[Nate152]

At the top of each column it gives you the current, minimum, maximum and average.

Your Vcore is showing Current - 1.296v, Minimum - 0.608v, Maximum - 1.328v, Average - 1.316v

What's happening is the Core VID is showing a Maximum of 1.340v, you can't go lower than this without using an offset, so anything above 1.340v you shouldn't need to use an offset.

Temps are now low to mid 70's, you have 10 degrees headroom and should be enough to get you to 5.0GHz at 85c or less.

You could try cpu core ratio 50, Additional Turbo Mode CPU Core Voltage Override 1.350v, bumping it up .01v until it becomes stable trying 1.360v,1.370v, 1.380v, 1.390v, stop at 1.40v if it's not stable by now. You shouldn't need an offset and keep a close eye on temps.

Post us a screenshot after trying this.

[Cheesy86]

Hey Nemesis. Thank you for joining the conversation. So I initially followed Boosted Media's video for manual overclocking.

https://youtu.be/pbRauc8gpQM

Will does an amazing job explaining everything. Learned a lot. Anyway, I managed to get a stable manual overclock with similar settings at 4.9ghz with 1.28V and temps at 73 degrees. I was like, heck yeah. Only thing I noticed was that even at balanced power options in windows the CPU would not throttle down even on idle. So I started to try and dwell into the awesomeness of adaptive voltage. Thats when I started working with Nate152.

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Hey Nate,

Thank you for your continuous encouragement and patience. Ok man, as soon as I get home I will try your suggestions (listed below):

Core Ratio: 50

Additional turbo mode: 1.35 ( work up on increments of .01 until stable)

No offset and keep eye on temps.

Like I mentioned, soon as I get home I'm jumping back on this. Thanks buddy. Hopefully I can catch you before the night ends.

[Nate152]

Awesome, that looks good and yes to all of the above.

It's generally another .05v (give or take) to hit the next 100MHz, so yep start with core ratio 50 and Additional Turbo Mode 1.33v - 1.35v. Hopefully you won't need much more than that.

[Cheesy86]

Hey Nate,

I know its late again man but doing some work, just like I said. Ran the changes like you asked me to try with a realbench test as well. These where the results after changing core ratio to 50, offset put at auto, and temps where at about mins:027 max: mid 80's. What do you think? How would you recommend I proceed?

[Nate152]

Thank you

All right, you hit 5.0GHz with max temp of 87c but, you shouldn't need 1.392v, it looks like you'll have to use the offset as the Maximum Vcore is showing 1.392v.

If you've entered Additional Turbo Mode 1.350v, use a negative offset of -0.040v like you did before, this should put the Maximum Vcore close to 1.350v and lower temps some.

Give this a try and see if it's stable, check the Maximum Vcore and where temps are.