Can´t get my i7 8700K to 5Ghz

[papo27]

Hello guys.

I would like to ask for help. 

Recently I bought I7 8700K and MSI z370 krait gaming motherboard. I am trying to overclock this chip but I am not able to get it stable after passing 4.8 Ghz. 

Even for 4.8 Ghz I have to use higher voltage. I also bought Alphacool Eisbear 420mm AIO but it is not helping as I have to use 1.4 volts for 5.0 Ghz - but still not able to pass Prime 95 and temperatures are really high.

Cinebench is working fine though....

And by higher voltage I compared it to other people on internet and they used 1.24-1.26 volts for 4.8 Ghz, but I have to use at least 1.32. 

So if you have any ideas please reply to this Topic! 

Thank you guys.

[Guest]

Could be the luck of the draw. Prime 95 is a bit aggressive though, how does it do in AIDA64?

[Bananasplit_00]

you got a bad chip basically. also i find P95 way, way to brutal. it crashes stuff that never crashes under any real world load so i dont see the point unless you are doing something thats extremely critical and if you are then you shouldnt be overclocking anyway

[NicholasNicholasNicholas]

4 minutes ago, papo27 said:

Hello guys.

I would like to ask for help. 

Recently I bought I7 8700K and MSI z370 krait gaming motherboard. I am trying to overclock this chip but I am not able to get it stable after passing 4.8 Ghz. 

Even for 4.8 Ghz I have to use higher voltage. I also bought Alphacool Eisbear 420mm AIO but it is not helping as I have to use 1.4 volts for 5.0 Ghz - but still not able to pass Prime 95 and temperatures are really high.

Cinebench is working fine though....

And by higher voltage I compared it to other people on internet and they used 1.24-1.26 volts for 4.8 Ghz, but I have to use at least 1.32. 

So if you have any ideas please reply to this Topic! 

Thank you guys.

p95 doesnt matter

but if you want the answer

more vcore pussy

[papo27]

5 minutes ago, Legendarypoet said:

Could be the luck of the draw. Prime 95 is a bit aggressive though, how does it do in AIDA64?

Thanks for reply. I think it is a bad luck, as always. 

Well I am able to RUN AIDA64 CPU stress test without problem for 2 hours with reasonable temperatures. 

It is just sad that people can run their CPU at 5.0 with 1.34/1.36 and I have to use similiar voltage for 4.8.

[papo27]

6 minutes ago, Bananasplit_00 said:

you got a bad chip basically. also i find P95 way, way to brutal. it crashes stuff that never crashes under any real world load so i dont see the point unless you are doing something thats extremely critical and if you are then you shouldnt be overclocking anyway

Thanks for reply. 

I gues I had bad luck again. 

I know that prime 95 is pretty heavy test though I wanted to pass it to have perfect stability. 

 

[Silentprototipe]

Silicon Lottery man, some win some lose. Cant change it  

[dizmo]

14 minutes ago, Bananasplit_00 said:

you got a bad chip basically. also i find P95 way, way to brutal. it crashes stuff that never crashes under any real world load so i dont see the point unless you are doing something thats extremely critical and if you are then you shouldnt be overclocking anyway

I think it's a little erroneous to call it a bad chip The chip works perfectly fine, it just doesn't OC as high as others.

[Lord Nicoll]

22 minutes ago, papo27 said:

Hello guys.

I would like to ask for help. 

Recently I bought I7 8700K and MSI z370 krait gaming motherboard. I am trying to overclock this chip but I am not able to get it stable after passing 4.8 Ghz. 

Even for 4.8 Ghz I have to use higher voltage. I also bought Alphacool Eisbear 420mm AIO but it is not helping as I have to use 1.4 volts for 5.0 Ghz - but still not able to pass Prime 95 and temperatures are really high.

Cinebench is working fine though....

And by higher voltage I compared it to other people on internet and they used 1.24-1.26 volts for 4.8 Ghz, but I have to use at least 1.32. 

So if you have any ideas please reply to this Topic! 

Thank you guys.

Well for one thing, with not great overclockers you're gonna need to drop temps are much as possible, you'll need to delid and relid with Liquid metal almost certainly to get 5GHz. Not all chips will do 5GHz, I know it's common to brag about "ugh my chip does 5.2GHz" [which is my daily on my i7 7700k] but those are usually good overclockers anyways. Also make sure that the other voltages are within the acceptable range, what's the RAM speed too? You might have to live with 4.8GHz or 4.9GHz. Are you overclocking the cache as well?

[papo27]

2 minutes ago, Lord Nicoll said:

Well for one thing, with not great overclockers you're gonna need to drop temps are much as possible, you'll need to delid and relid with Liquid metal almost certainly to get 5GHz. Not all chips will do 5GHz, I know it's common to brag about "ugh my chip does 5.2GHz" [which is my daily on my i7 7700k] but those are usually good overclockers anyways. Also make sure that the other voltages are within the acceptable range, what's the RAM speed too? You might have to live with 4.8GHz or 4.9GHz. Are you overclocking the cache as well?

What do you suggest for other voltages? I wasn´t sure what do do with them so they are set to auto. 

Right now I have 16gb and they are running 2400Mhz.

[Lord Nicoll]

3 minutes ago, papo27 said:

What do you suggest for other voltages? I wasn´t sure what do do with them so they are set to auto. 

Right now I have 16gb and they are running 2400Mhz.

standard for VCCIO and VCCSA is usually about just under 1 volt, sometimes at or a little over, but 1.15v for each can help as some chips need a little more. PCH voltage can be left on auto, PLL termination voltage of 1.1 might help, along with a core PLL of 1.1 too.  If you can keep the chip under about 75°C it should do 5GHz. Some LLC might help too, in case there is some vdroop. 

[Langley_Man]

I had the same issue. Just changing voltage I couldn't get it stable. Even at 1.4 and just like u the temps were dumb 

 

I then tried 1.4v

With -8 offset. Brings vid to 3.25v prety much locked there and I'm very stable and temps not going over 70 with a baby kranken x42 v2 cooler 

 

I did however lower my ram speed I havnt tried cranking it back up since it's stable now and scared to mess with it

[xg32]

1.4 for 5ghz isn't the worst, i wouldn't go for it on that motherboard though, vrm must be 100+C at 4.8. 

[Langley_Man]

50 minutes ago, xg32 said:

1.4 for 5ghz isn't the worst, i wouldn't go for it on that motherboard though, vrm must be 100+C at 4.8. 

Voltage is solid  with the offset 3.25

Just checked VRM temp .. there sitting around 30C idle and 35sih  under stress test

[Ebony Falcon]

U could push llc a touch just in case it's dropping vcore under full load a bit ? 

 

[papo27]

On 9. 1. 2018 at 1:00 AM, LangleyNerd said:

I had the same issue. Just changing voltage I couldn't get it stable. Even at 1.4 and just like u the temps were dumb 

 

I then tried 1.4v

With -8 offset. Brings vid to 3.25v prety much locked there and I'm very stable and temps not going over 70 with a baby kranken x42 v2 cooler 

 

I did however lower my ram speed I havnt tried cranking it back up since it's stable now and scared to mess with it

Thank you for reply.

So I put it on 1.4 and offset -0,080. But still crashed on Prime95.
I will try to play some games with it and will see. 

If it won´t work I think I will put it on 4.8 and let it live his calm life. 

[Langley_Man]

Did u put avx offset to -2 

 

Also try downclocking your ram. May or may not make a difference.

 

What's your LLC set at?

[Langley_Man]

Ps. For your enjoyment check out my post on this thread. I took the time to screen capture my bios settings for this guy which seemed to help.

 

https://linustechtips.com/main/topic/883963-8700k-not-at-max-speed-on-adaptive-setting/?do=findComment&comment=10920860