8086k not stable @5ghz?

[oxide80]

Yeah so a few months ago I decided to purchase a pre-built pc (first mistake) which has an 8086k sitting in a ASRock Z370 Pro4 with some 120mm Coolermaster aio. I've always been trying to overclock it to 5ghz but its never stable no matter the voltage (tried all voltages from 1.250v - 1.4v).

 

The most stable voltage I have found is 1.325v which handles CINEBENCH15 very well but only survives around 3 runs in ASUS RealBench 2.43 before reaching in the high 80s - low 90s degrees then crashing (idle temps are about 36-43 degrees). I thought the aio was the main issue so 3 days ago I replaced it with a Corsair h115i 280mm however nothing has changed. I was considering deli-dding but I have a feeling its probably not going to fix it also I've never done it and I don't really trust myself so at this point I am just considering getting a new mobo/cpu combo as I think one of them is defective, but I thought I would ask if anyone has any possible solutions or if im missing something in the overclocking process as im pretty new to it.

 

Cheers.

 

[Spotty]

Motherboard isn't great for overclocking. Why not just run it at 4.9GHz? What are you using the CPU/system for?

[Andrew279cz]

Hi,

 the motherboard you have isn't a really good overclocking motherboard in the first place. Those tiny VRM cooler might not be able to keep those VRMs cool. Except the "meh" motherboard, Intel might have done a poor job applying TIM, so delidding would really help.

[oxide80]

1 minute ago, Spotty said:

Motherboard isn't great for overclocking. Why not just run it at 4.9GHz? What are you using the CPU/system for?

I guess I could run at lower clock speeds its just that I would like to get the most of my cpu as I stream games and I would like to get as much FPS as possible. I also do video/modelling projects.

[xg32]

2 minutes ago, oxide80 said:

I guess I could run at lower clock speeds its just that I would like to get the most of my cpu as I stream games and I would like to get as much FPS as possible. I also do video/modelling projects.

careful of vrm temps pushing that much on a pro4

[Andrew279cz]

1 minute ago, oxide80 said:

I guess I could run at lower clock speeds its just that I would like to get the most of my cpu as I stream games and I would like to get as much FPS as possible. I also do video/modelling projects.

If I were you I would sell your current MoBo and get a better one instead (Asrock Z370 Extreme4 is a good value overclocking mobo if your budget is limited)

Buy a delidding tool, replace the Intel's TIM with some Liquid metal. Overclocking and temps will be way better.

[RobbinM]

Get some VRM cooling and try lowering the vCore as much as you can.

[oxide80]

3 minutes ago, Andrew279cz said:

If I were you I would sell your current MoBo and get a better one instead (Asrock Z370 Extreme4 is a good value overclocking mobo if your budget is limited)

Buy a delidding tool, replace the Intel's TIM with some Liquid metal. Overclocking and temps will be way better.

Yeah I might just do that but I'll probably end up getting some sort of high end Z390 board as I don't really have a budget. And yeah I might end up delidding too.

[Andrew279cz]

1 minute ago, oxide80 said:

Yeah I might just do that but I'll probably end up getting some sort of high end Z390 board as I don't really have a budget. And yeah I might end up delidding too.

Good for you But do some research before making a purchase (eh, Asus Maximus XI Hero and its hot VRMs)

Not all Z390 boards in the same proce range are equil. But those worth mentioning are Gigabyte Z390 Ultra (or Master) and Asrock Z390 Taichi.

[oxide80]

13 minutes ago, RobbinM said:

Get some VRM cooling and try lowering the vCore as much as you can.

im not too familiar with VRM cooling but how exactly would I go about it? Would I need more airflow?

[oxide80]

3 minutes ago, Andrew279cz said:

Good for you But do some research before making a purchase (eh, Asus Maximus XI Hero and its hot VRMs)

Not all Z390 boards in the same proce range are equil. But those worth mentioning are Gigabyte Z390 Ultra (or Master) and Asrock Z390 Taichi.

Alright cheers for the advice I will do some research on those boards you mentioned and if nothing else pops up I might grab one.

[RobbinM]

Yes. As you are watercooling your CPU at the moment there is very little airflow over those VRM's, giving them a hard time.

The suggestion to delid is also a very valid one I think. When you delid, you can overclock with a lower vCore. When you have less vCore, you have less strain on your VRM.

Remember that raising the vCore raises the power draw exponantially, so lowering it may drastically improve your experience.

But first things first, those VRMs need some airflow.

[Andrew279cz]

11 minutes ago, RobbinM said:

Yes. As you are watercooling your CPU at the moment there is very little airflow over those VRM's, giving them a hard time.

The suggestion to delid is also a very valid one I think. When you delid, you can overclock with a lower vCore. When you have less vCore, you have less strain on your VRM.

Remember that raising the vCore raises the power draw exponantially, so lowering it may drastically improve your experience.

But first things first, those VRMs need some airflow.

Good thing to mention the importance of case airflow. But that mostly depends on his case and number and type of fans. 

But there is a limit how much heat you can dissipate from those tiny heatsinks.

[oxide80]

1 minute ago, RobbinM said:

Yes. As you are watercooling your CPU at the moment there is very little airflow over those VRM's, giving them a hard time.

The suggestion to delid is also a very valid one I think. When you delid, you can overclock with a lower vCore. When you have less vCore, you have less strain on your VRM.

Remember that raising the vCore raises the power draw exponantially, so lowering it may drastically improve your experience.

But first things first, those VRMs need some airflow.

Ah right will do, I actually did order some corsair fans the other day just in case this was the issue lol. And if it doesn't help too much I'm probably going to delid, even though I've never done it before. Thanks for the insight.

[RobbinM]

@Andrew Yup, that's why I'm pushing him to lower his vCore.

[porina]

I have same CPU and mobo. From memory I was Cinebench R15 stable to 5.1 without delid (Noctua D15) but I never really did in depth stability testing. Certainly it seemed ok for benching. My notes suggest I was using +0.1v offset whatever that works out to be. I didn't like the voltage control and monitoring on this mobo.

 

I do have an instability when running stock if I run Prime95 like loads for more than a day or so. Never figured it out.

[Andrew279cz]

3 minutes ago, porina said:

I have same CPU and mobo. From memory I was Cinebench R15 stable to 5.1 without delid (Noctua D15) but I never really did in depth stability testing. Certainly it seemed ok for benching. My notes suggest I was using +0.1v offset whatever that works out to be. I didn't like the voltage control and monitoring on this mobo.

 

I do have an instability when running stock if I run Prime95 like loads for more than a day or so. Never figured it out.

That's quite impressive, you probably won the silicon lottery. I bet with a better MoBo and after delid you could easily get past 5.3Ghz

But as RobbinM has said, aircoolers really help with VRM temps.

[Ebony Falcon]

DELId drops power leakage aswell 10c off temps is 0.01v off the voltage for same oc from all my testing 

i yook 36c off mine with delid and 0.04v for same oc