I7-8700K 5GZ Overclock

[HDshiny]

So I'm trying to overclock my CPU to 5GZ and have followed videos online that show what i need to do. i have a Asus Z370-F gaming Motherboard and a I7-8700K. when i do the overclock and try do a prime95 stress test it comes up with an error on some of the cores. what is it i need to change ? Pictures show BIOS settings and error codes on Prime95

 

 

[Electronics Wizardy]

what load temps are you running?

 

Try bumping up the vcore a bit if temps are fine.

 

Also not all chips can hit 5ghz.

[HDshiny]

1 minute ago, Electronics Wizardy said:

what load temps are you running?

 

Try bumping up the vcore a bit if temps are fine.

 

Also not all chips can hit 5ghz.

temps went to like 70-80 degrease C and at idle its 30-40 degrease C

[badreg]

1.29v is not going to get it done. Probably less than 5% of 8700k's will be able to do 5.0Ghz on that voltage.

 

Try 1.35v as a starting point and make sure that LLC is set to an appropriate level for your board.

[HDshiny]

12 minutes ago, badreg said:

1.29v is not going to get it done. Probably less than 5% of 8700k's will be able to do 5.0Ghz on that voltage.

 

Try 1.35v as a starting point and make sure that LLC is set to an appropriate level for your board.

Currently following this video atm just to check over everything https://youtu.be/bD1Ze80GpLo

[Velcade]

 

Mr. D knows what he's doing.  Try to follow his guide.

[HDshiny]

18 minutes ago, HDshiny said:

Currently following this video atm just to check over everything https://youtu.be/bD1Ze80GpLo

Followed this and temps went to like 80°c and got 2 fails 

[HDshiny]

41 minutes ago, Velcade said:

 

Mr. D knows what he's doing.  Try to follow his guide.

 

 

[HDshiny]

1 hour ago, badreg said:

1.29v is not going to get it done. Probably less than 5% of 8700k's will be able to do 5.0Ghz on that voltage.

 

Try 1.35v as a starting point and make sure that LLC is set to an appropriate level for your board.

Still get 1 error with This. Should I up my voltage? 

[Mick Naughty]

Using an asus board myself, it has an ez 5.0 oc setting on it. The voltage is high but that can always be turned down if it’s stable. 
Also used the auto oc option and went over 5.1. 
 

I just set my multiplier to 50 and voltage to manual and 1.32. Haven’t really done much else to dial it in. Just made it stable. 

[HDshiny]

12 hours ago, Mick Naughty said:

Using an asus board myself, it has an ez 5.0 oc setting on it. The voltage is high but that can always be turned down if it’s stable. 
Also used the auto oc option and went over 5.1. 
 

I just set my multiplier to 50 and voltage to manual and 1.32. Haven’t really done much else to dial it in. Just made it stable. 

Tried that but when I ran prime95 It failed just gone back to stock now seems like I can't get the right settings for a overclock 

[ChrisLoudon]

What version of Prime95 are you using and are you trying spank it with an AVX workload?

 

My 8700k and 8086k both do 5Ghz at 1.35v with liquid metal and hover around 55c on blend and 65c with small FFt's when using Prime 26.6 which DOESNT use AVX.

 

If I try and run a small FFT test with any of the later AVX enabled versions of Prime, I get the same as you.

 

I don't think Prime is the best test for system stability as its workloads are completely unrealistic. Maybe give Cinebench R20 a bash.

[HDshiny]

11 minutes ago, ChrisLoudon said:

What version of Prime95 are you using and are you trying spank it with an AVX workload?

 

My 8700k and 8086k both do 5Ghz at 1.35v with liquid metal and hover around 55c on blend and 65c with small FFt's when using Prime 26.6 which DOESNT use AVX.

 

If I try and run a small FFT test with any of the later AVX enabled versions of Prime, I get the same as you.

 

I don't think Prime is the best test for system stability as its workloads are completely unrealistic. Maybe give Cinebench R20 a bash.

Yeal il give Cinebench ago because no matter what I changed my voltage to it still said it was I stable and I always had 1 error. Now for some reason with everything in stock settings I'm gett idle temps of like 45-50°c where before it was like 30-35°c

[Mister Woof]

Mine needs 1.38v for 5ghz, and that voltage needed a delid.

 

Not every 8700k is going to his 5ghz.

[ChrisLoudon]

1 minute ago, HDshiny said:

Yeal il give Cinebench ago because no matter what I changed my voltage to it still said it was I stable and I always had 1 error. Now for some reason with everything in stock settings I'm gett idle temps of like 45-50°c where before it was like 30-35°c

Like I said, Prime with AVX can send you down a rabbit hole of misery when trying to dial in an overclock.

 

I use 26.6 to make sure my temps are good when the CPU usage is pegged at 100% but later versions of Prime's use of AVX can bring most systems to their knees.

 

Your idle temps are a cause for concern. My 8700k is currently sitting at no more than 35c in a rather toasty room.

 

Have you reseated your cooler and reapplied thermal paste?

 

If you haven't already tried, get onto Amazon and by some liquid metal and delidding tool. Using LM has given me the single largest drop in temps.

[ChrisLoudon]

Forgot to say that when using Cinebench, select 'Advanced Benchmark' from the file menu as the standard test is a single pass that will be over and finished inside a minute. The advanced bench lets you select a 10min or 30min run.

 

Another AVX workload test that you can loop is the CPU test in TimeSpy 3DMark. Again, you'll need to select the advanced / custom options but either of these should be more than sufficient to test stability and temps in a more real-world way.

[Mister Woof]

I use Cinebench for a quick preliminary test for both stability and quick temperature test - if it fails or posts whea errors, it definitely isn't stable and back to the drawing board. If it overheats, it's too much voltage for sure.

 

If it passes Cinebench, then I will run it for a couple hours on RealBench. If that passes, very good chance it will be fine in real world workloads as RealBench is a much more intensive benchmark that also stresses GPU and CPU simultaneously, which is often where instability issues come up when you're actually using it (usually gaming) 

 

If it manages a couple hours of RealBench without failures or wheas, it's probably fine.

 

[HDshiny]

4 hours ago, Mister Woof said:

Mine needs 1.38v for 5ghz, and that voltage needed a delid.

 

Not every 8700k is going to his 5ghz.

I'm my bios there's a quick 5ghz overclock. Did that and seems fine on cinebench just ran at like 90°c. what do you recon i should put my voltage and dram voltage to? 

[Mister Woof]

38 minutes ago, HDshiny said:

I'm my bios there's a quick 5ghz overclock. Did that and seems fine on cinebench just ran at like 90°c. what do you recon i should put my voltage and dram voltage to? 

Depends on your cooling - anything above 1.35v tends to be incredibly difficult to cool without a delid under heavy loads.

 

Then you need to be conscious of your VRM temperatures as well.

[HDshiny]

23 minutes ago, Mister Woof said:

Depends on your cooling - anything above 1.35v tends to be incredibly difficult to cool without a delid under heavy loads.

 

Then you need to be conscious of your VRM temperatures as well.

Iv currently got a custome ek watercooling loop. What would you recommend to put my cpu voltage and my dram voltage to be? 

[HDshiny]

Whiles running cinebench with my fans on 100% and my watercooling pump on 100% my pc is at 90°c. My toom temp is 19°c can't seem to get it to go below 90°C

[Mister Woof]

DRAM should be whatever XMP sets and depending if its stable at whatever it's at. 

 

1.45 is my personal upper limit on dram.

 

your CPU is hot because the intel TIM sucks, and probably too much automatic voltage.

 

 

[HDshiny]

So you reacon I should just have my CPU Core Voltage Override at 1.350 and leave everything else on auto like this? Apologies for so many questions it's my first time overclocking