Delidded Coffee lake not stable at 5ghz?

[Ayala]

I have a delidded 8700k with an h100i v2 aio. I overclocked it in the bios to 5 ghz following this guide: https://overclocking.guide/gigabyte-z370-overclocking-coffee-lake/. However, it failed the stress test and I got the blue screen of death. I put the cpu at 4.8 ghz and only 4 of the cores were running at 100%, which apparently means it failed. Is this normal? Am I doing something wrong? What should I do now?

[sazrocks]

What voltage?

[xg32]

please provide your full setup, 8700k is only guaranteed 4.9, unless u bought it off SL.

[Ayala]

11 minutes ago, xg32 said:

please provide your full setup, 8700k is only guaranteed 4.9, unless u bought it off SL.

I have an 8700k with a gigabyte gaming 5 z370 and a 1080ti, h100i v2 cooler, s340 elite case, a 250 gb ssd and a 2tb hdd and a 650w evga g3 supernova psu. 

[xg32]

what voltage? and did u buy a binned cpu off silicon lottery? because some 8700k only goes 4.9, also 650w is a bit pushing it for a 1080ti, h100i and 8700k on full oc, don't think thats the problem here tho. I have a similar setup and it draws over 500w according to the online calculator

[Ayala]

1 minute ago, xg32 said:

what voltage? and did u buy a binned cpu off silicon lottery? because some 8700k only goes 4.9, also 650w is a bit pushing it for a 1080ti, h100i and 8700k on full oc, don't think thats the problem here tho. I have a similar setup and it draws over 500w according to the online calculator

I bought my cpu off jncs computers bc it was $385, how do you check the voltage?

[xg32]

1 minute ago, Ayala said:

I bought my cpu off jncs computers bc it was $385, how do you check the voltage?

download hwinfo, put the cpu on full load, check core temps, if the chip wasn't binned then there's a small chance that it can only go 4.9

[Princess Luna]

Bad motherboard for 5ghz overclocking personally speaking.

[xg32]

1 minute ago, Princess Cadence said:

Bad motherboard for 5ghz overclocking personally speaking.

i thought gaming 5 was good, what's the problem?

[Ayala]

7 minutes ago, xg32 said:

download hwinfo, put the cpu on full load, check core temps, if the chip wasn't binned then there's a small chance that it can only go 4.9

1.14 V, it was around 1.27 i think a few seconds ago but somewhere in that range. Only 4 cores are showing 100% load, is that bad? under the stress test there are 2 cores around 0%

[Ayala]

10 minutes ago, xg32 said:

download hwinfo, put the cpu on full load, check core temps, if the chip wasn't binned then there's a small chance that it can only go 4.9

Also, while running the stress test at 4.8 I got the blue screen again. 

[xg32]

2 minutes ago, Ayala said:

1.14 V, it was around 1.27 i think a few seconds ago but somewhere in that range. Only 4 cores are showing 100% load, is that bad? under the stress test there are 2 cores around 0%

1.27 sounds about right for 4.8, depends on your cpu, you'll need to increase the voltage to get 5.0, but i highly recommend just sticking with 4.8*

[Ayala]

6 minutes ago, xg32 said:

1.27 sounds about right for 4.8, depends on your cpu, you'll need to increase the voltage to get 5.0, but i highly recommend just sticking with 4.8*

4.8 isn’t stable though. 

[xg32]

then ull need to go down to 4.7 for now until u can find the manual voltage setting in the bios

 

one note, i just went on the psu calculator again to make sure, ur system can be using anywhere from 600-750w in actual load depending on ur fans etc. so that could be a potential problem, it's most likely just the cpu voltage for now because the stress test only stresses the cpu.

[Ayala]

5 minutes ago, xg32 said:

then ull need to go down to 4.7 for now until u can find the manual voltage setting in the bios

 

one note, i just went on the psu calculator again to make sure, ur system can be using anywhere from 600-750w in actual load depending on ur fans etc. so that could be a potential problem, it's most likely just the cpu voltage for now because the stress test only stresses the cpu.

Ok. I wasn’t planning on getting a 1080ti, already bought a 1080 and my psu when I got an offer for a 1080ti for $500. I hope it’s not a problem. What should I set my cpu voltage to?

[Ayala]

I found the voltage setting in the bios, it’s set to 1.280 V. What should I set it too?

 

8 minutes ago, xg32 said:

then ull need to go down to 4.7 for now until u can find the manual voltage setting in the bios

 

one note, i just went on the psu calculator again to make sure, ur system can be using anywhere from 600-750w in actual load depending on ur fans etc. so that could be a potential problem, it's most likely just the cpu voltage for now because the stress test only stresses the cpu.

 

[xg32]

7 minutes ago, Ayala said:

I found the voltage setting in the bios, it’s set to 1.280 V. What should I set it too?

 

 

1.375 or below for everyday use imho, maybe 1.35 since the psu is also a concern, temps have to stay under 85C, im guessing 1.27 4.7 is stable so 1.375 might JUST be enough for 5.0, but no guarantees. if that's stable then u could try 1.35 4.9 for everyday use.

[Ayala]

22 minutes ago, xg32 said:

1.375 or below for everyday use imho, maybe 1.35 since the psu is also a concern, temps have to stay under 85C, im guessing 1.27 4.7 is stable so 1.375 might JUST be enough for 5.0, but no guarantees. if that's stable then u could try 1.35 4.9 for everyday use.

It’s not stable for 4.8 1.35, but stable at 1.4. Is this too much voltage? What are the downsides?

[xg32]

7 minutes ago, Ayala said:

It’s not stable for 4.8 1.35, but stable at 1.4. Is this too much voltage? What are the downsides?

1.4 will definitely degrade ur cpu, and it'll get too hot so i'd go with 4.7 1.35. if 4.8 1.35 isn't stable it could be quite a few factors, the motherboard, the power supply , or just bad luck on the cpu. It's possible the vendor that delidded/sold u the cpu knew that it was a low roll, delidding and binning tends to go hand in hand.

[Ayala]

3 minutes ago, xg32 said:

1.4 will definitely degrade ur cpu, and it'll get too hot so i'd go with 4.7 1.35. if 4.8 1.35 isn't stable it could be quite a few factors, the motherboard, the power supply , or just bad luck on the cpu. It's possible the vendor that delidded/sold u the cpu knew that it was a low roll, delidding and binning tends to go hand in hand.

I delidded it myself, but Its possible that’s its not a great cpu. I’ll bring it down to 1.35, thanks for all the help!

[Ayala]

16 minutes ago, xg32 said:

1.4 will definitely degrade ur cpu, and it'll get too hot so i'd go with 4.7 1.35. if 4.8 1.35 isn't stable it could be quite a few factors, the motherboard, the power supply , or just bad luck on the cpu. It's possible the vendor that delidded/sold u the cpu knew that it was a low roll, delidding and binning tends to go hand in hand.

What should the max/min temps be for the cpu, out of curiosity? It’s stable now at 4.7. 

[xg32]

5 minutes ago, Ayala said:

What should the max/min temps be for the cpu, out of curiosity? It’s stable now at 4.7. 

85C in prime, realistically ull never hit 100% on gaming, so even seeing 85 is fine.

[Ayala]

5 minutes ago, xg32 said:

85C in prime, realistically ull never hit 100% on gaming, so even seeing 85 is fine.

Ok good, most of the max temps were in the 60s and 70s.