i5-8600K Overclocking Help

TheTerminator8 · Nov 22, 2017

Hey guys, so I just got my 8600K and I am seriously pissed. I have it on a MSI Z370 PRO CARBON (Non-AC) motherboard. I set the multiplier to 50 (Equaling to 5.0GHz) and tried to set the Core voltage (or what I think it is) to 1.35V like everyone else. Fine, I boot up nicely. Then I run AIDA64 for less than 5 minutes and it crashes. I can run Cinebench R15 all day no problems.

I am confused on which one I should be changing for the voltage and how much?!

Is it;

IO Core
GT Core
Core Voltage?

Please help,
Thank you.

Specs:
i5--8600K
Corsair AX860i PSU
G.Skill TridentZ 16GB (XMP 3200MHz)
Corsair H100i V2
Samsung 960 EVO (250GB)

bjornl · Nov 22, 2017

It is core voltage.
5.0 is not a given.
start smaller and at a lower voltage.
Watch your temps. (I don't trust AIO water coolers)

Also consider
https://siliconlottery.com/collections/sl

TheTerminator8 · Nov 22, 2017

bjornl :

Yeahhhhh.....I think I fixed it? I set the voltage to auto and the BIOS ramped it up to 1.45-ish or something like that and I've been running AIDA64 with it at 5GHz for 22 minutes as of now, and there aren't any problems....any advice on this? Thanks for the reply.

bjornl · Nov 22, 2017

TheTerminator8 :

I have terrible luck running voltage at auto. Either not enough (crash) or too much ( crash).
Read through the reviews and see what voltages others used with success.
https://m.hardocp.com/article/2017/10/05/intel_coffee_lake_core_i58600k_vs_7600k_at_5ghz_review
http://www.tomshardware.com/reviews/intel-coffee-lake-core-i5-8600k-cpu,5264-11.html

TheTerminator8 · Nov 22, 2017

bjornl :

TheTerminator8 :

I have terrible luck running voltage at auto. Either not enough (crash) or too much ( crash).
Read through the reviews and see what voltages others used with success.
https://m.hardocp.com/article/2017/10/05/intel_coffee_lake_core_i58600k_vs_7600k_at_5ghz_review
http://www.tomshardware.com/reviews/intel-coffee-lake-core-i5-8600k-cpu,5264-11.html

OK, thanks. Do you have experience with overclocking any Coffee Lake processors? Just asking out of curiosity because if you do I'd be curious in what settings you went with. Thanks again.

bjornl · Nov 22, 2017

TheTerminator8 :

bjornl :

OK, thanks. Do you have experience with overclocking any Coffee Lake processors? Just asking out of curiosity because if you do I'd be curious in what settings you went with. Thanks again.

Nope. I've overclocked just about everything else, including my 5930k. But every chip is unique, so even if I had the exact same everything as you we'd still have different settings. If you want to compare your settings to others google for reviews on the system. They typically post their tested settings. Remember good cooling is just as important as the perfect voltage.

TheTerminator8 · Nov 22, 2017

bjornl :

TheTerminator8 :

Nope. I've overclocked just about everything else, including my 5930k. But every chip is unique, so even if I had the exact same everything as you we'd still have different settings. If you want to compare your settings to others google for reviews on the system. They typically post their tested settings. Remember good cooling is just as important as the perfect voltage.

Yes. Does voltage effect temperatures when at full load? I see a lot of people with coolers and the processor at 1.2V or something similar and it's at full load and only at around 70C. Mine was hovering around 78-81C during my 30 minute AIDA64 run with it on the automatic voltage setting.

bjornl · Nov 22, 2017

TheTerminator8 :

bjornl :

TheTerminator8 :

Nope. I've overclocked just about everything else, including my 5930k. But every chip is unique, so even if I had the exact same everything as you we'd still have different settings. If you want to compare your settings to others google for reviews on the system. They typically post their tested settings. Remember good cooling is just as important as the perfect voltage.

Yes. Does voltage effect temperatures when at full load? I see a lot of people with coolers and the processor at 1.2V or something similar and it's at full load and only at around 70C. Mine was hovering around 78-81C during my 30 minute AIDA64 run with it on the automatic voltage setting.

Voltage very much impacts temps.

TheTerminator8 · Nov 22, 2017

bjornl :

TheTerminator8 :

bjornl :

Yes. Does voltage effect temperatures when at full load? I see a lot of people with coolers and the processor at 1.2V or something similar and it's at full load and only at around 70C. Mine was hovering around 78-81C during my 30 minute AIDA64 run with it on the automatic voltage setting.

Voltage very much impacts temps.

I assumed as much, should I try going to 1.2 volts and see what happens?

bjornl · Nov 22, 2017

TheTerminator8 :

bjornl :

TheTerminator8 :

bjornl :

Yes. Does voltage effect temperatures when at full load? I see a lot of people with coolers and the processor at 1.2V or something similar and it's at full load and only at around 70C. Mine was hovering around 78-81C during my 30 minute AIDA64 run with it on the automatic voltage setting.

Voltage very much impacts temps.

I assumed as much, should I try going to 1.2 volts and see what happens?

What I do is find the OC. Then dial it back 1-200mhz and find the lowest stable voltage for that.

TheTerminator8 · Nov 22, 2017

bjornl :

TheTerminator8 :

bjornl :

TheTerminator8 :

Voltage very much impacts temps.

I assumed as much, should I try going to 1.2 volts and see what happens?

What I do is find the OC. Then dial it back 1-200mhz and find the lowest stable voltage for that.

So find it's max GHz (In this case 5, because I want it to stay there) then go farther back until it's not enough?

bjornl · Nov 22, 2017

TheTerminator8 :

bjornl :

TheTerminator8 :

What I do is find the OC. Then dial it back 1-200mhz and find the lowest stable voltage for that.

So find it's max GHz (In this case 5, because I want it to stay there) then go farther back until it's not enough?

Yup. You want a safety margin, and this is the simplest way to achieve it. If you want to go right to the edge, the siliconlottery site will delid and use metal/solder in stead of glue for a few bucks. It will give you lower temps and a more stable overclock. When I goto a 8700k (or 9700k more likely) I intend to buy my cpu and ship it to that guy. I could delid the CPU (I have done this in the past) but he wants so little for his work and warranties that it is done correctly that it is just a no-brainer to me.

TheTerminator8 · Nov 22, 2017

bjornl :

TheTerminator8 :

bjornl :

So find it's max GHz (In this case 5, because I want it to stay there) then go farther back until it's not enough?

Yup. You want a safety margin, and this is the simplest way to achieve it. If you want to go right to the edge, the siliconlottery site will delid and use metal/solder in stead of glue for a few bucks. It will give you lower temps and a more stable overclock. When I goto a 8700k (or 9700k more likely) I intend to buy my cpu and ship it to that guy. I could delid the CPU (I have done this in the past) but he wants so little for his work and warranties that it is done correctly that it is just a no-brainer to me.

This is true. Thanks for all your help. If I end up leaving it at the Auto setting and everything works, (Given that I just ran it at 5GHz w/ 1.45-ish volts) should I keep it there? I will definitely find the safety margin, though.

bjornl · Nov 22, 2017

TheTerminator8 :

What were your temps like during aida64 CPU stress testing?

Something to compare to:
http://www.tomshardware.com/reviews/intel-coffee-lake-core-i5-8600k-cpu,5264-11.html

biglizard · Nov 22, 2017

Have you updated BIOS?

Have you adjusted other voltages, IO SA?

What other settings have you tried?

My 8700k wouldn't boot at 5ghz until I updated to latest BIOS no matter what voltage I applied, and still is not stable.

These chips are hot, most are going to need a delid, bjornl's advice is solid.

TheTerminator8 · Nov 22, 2017

bjornl :

Around 80C w/ the H100i V2. I'm thinking of dropping the OC to 4.9....

bjornl · Nov 22, 2017

TheTerminator8 :

80c is not bad during stress testing. I am amazed it worked with auto on the voltage. Even with those good temps, I would still be concerned running it at v1.45. If this is accurate, it is very high. Likely in to the danger zone. Maybe consider Intel's overclocking insurance for $40 bucks?
https://click.intel.com/tuningplan/

i5-8600K Overclocking Help

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