Thanks Dougal, glad to know I am not burning up the chip.  I did some reading last night and have figured out what I need to adjust to get the voltage and speed to drop when under no load (i.e. not simming).  As I have not delidded the chip I decided on a moderate overclock and have also boosted the ram speed up to 3000 (for which they are rated).

21 hours ago, MarkW said:

Thanks Dougal, glad to know I am not burning up the chip.  I did some reading last night and have figured out what I need to adjust to get the voltage and speed to drop when under no load (i.e. not simming).  As I have not delidded the chip I decided on a moderate overclock and have also boosted the ram speed up to 3000 (for which they are rated).

I only recently discovered how to correctly do this. I found it very confusing.  Not surprising I suppose, when different motherboard vendors use different methods.  Its nice to know now, that when I'm not actively using the PC for anything heavy, that clock speeds, voltages and temps all roll back to the minimum necessary. 

4 hours ago, Dougal said:

I only recently discovered how to correctly do this. I found it very confusing.  Not surprising I suppose, when different motherboard vendors use different methods.  Its nice to know now, that when I'm not actively using the PC for anything heavy, that clock speeds, voltages and temps all roll back to the minimum necessary. 

ASUS seems to be very simple but Gigabyte is far more convoluded.  I had to delve into the overclocking forums which are just brutal for a novice.  Kind of like what it would be like for a new flight simmer jumping into the PMDG forums on day 1.

What do you guys consider safe temperatures for the 8700K.  Right now running 4.8Ghz and when running P3D have core temps that are in the 40's and 50's but 3 of the cores go into the 60's and sometimes 70, 71C for a second before dropping back down to 48-52 for a few seconds then back up again.  Is this typical and ok for this chip?

19 hours ago, MarkW said:

What do you guys consider safe temperatures for the 8700K.  Right now running 4.8Ghz and when running P3D have core temps that are in the 40's and 50's but 3 of the cores go into the 60's and sometimes 70, 71C for a second before dropping back down to 48-52 for a few seconds then back up again.  Is this typical and ok for this chip?

 

 

The temperatures you mention are perfectly okay, well within an acceptable range. 

Brief temp spikes even higher than you mention aren't an issue, in fact temp spikes is the way Intel CPU's function these days, why some complain about fans ramping up and down.

"Sustained" high temps in the high 80's are regarded as less than desirable by many, but important to point out that TJunction for the 8700K is  100 degrees. This is the maximum temperature allowed at the die. 

Great thanks for the info. 

Well my 8700K isn't  a good overclocker I'm afraid.  If I were simming I'd be a bit disappointed, but given I'm not and don't require uber CPU frequency it's not an issue.

From what I could tell, if I'd continued messing about, it would have needed 1.45 volts to be stable at 5 GHz on all cores. Not that impressive. And at 1.4 volts, even delidded, the temp was nudging toward what I deem my upper limit. Given I like a quiet system, not acceptable for me.

I wasn't too impressed with XMP plus MCE either to be honest. Was up to 78 degrees in RealBench, due to the higher voltage associated with MCE. For what is essentially minimal gain.

Not only that, but with MCE on, voltage and frequency stayed higher than it should have been running merely Ai Suite. A bit weird. 

I'm sticking to XMP without MCE and all is well. Quiet, cool and nice gaming experience. After a few more BIOS updates all may change.

My 8700K isn't too good either but I turned off HT and managed to hit stable 5.2 @ 1.420 with temps in mid 80.
I settled for 5.0 at 1.35 but I run it locked. Temps rarely hit 70. Got the H150i & 32GB RAM @ XMP 3200.
When not simming I switch profile in XTU to 4.7 just to bring the temps even lower.
Purchased Intel OC warranty so if it degrades I'll just ship it for replacement.

17 minutes ago, PaulGR said:

My 8700K isn't too good either but I turned off HT and managed to hit stable 5.2 @ 1.420 with temps in mid 80.
I settled for 5.0 at 1.35 but I run it locked. Temps rarely hit 70. Got the H150i & 32GB RAM @ XMP 3200.
When not simming I switch profile in XTU to 4.7 just to bring the temps even lower.
Purchased Intel OC warranty so if it degrades I'll just ship it for replacement.

 

 

HT off drops temps by 10 degrees.  I might give it a try tomorrow out of interest. What were you stressing it with? And do you remember the ambient temp?

Do you remember the voltage frequency and temp it failed at with HT on? 

 

36 minutes ago, martin-w said:

 

 

HT off drops temps by 10 degrees.  I might give it a try tomorrow out of interest. What were you stressing it with? And do you remember the ambient temp?

Do you remember the voltage frequency and temp it failed at with HT on? 

 

I run RealBench first. Then I go to Cinebench and in the end I settle with INTEL's XTU test for several hours and do same process for memory. After that I just play BF4 / Wildlands / Division on ultra for 1-2 hours. Following this pattern I never had any day to day problems and running those 24h Prime ultra heating (even old version) tests is a serious case of OCD in my opinion.

Yesterday I took a 5h flight while running Spotify, working on a heavy 900MB Photoshop file, doing some code in Unity / Visual Studio and the usual web browsing. All smooth like a butter with locked 5.0.

I was able to push it with HT on for 5-6min without crash @ 1.45 but temps would go to mid/high 90s. Too much for my comfort. Delidding would fix it but I'm ok with it now.  Also I should mention that I like to keep my cache as close to VCore as I can. In the end I'm at 50 / 48 with fixed 1.35 which makes me happy. On my 4790K I was 47 / 44. Anything else would BSOD.

**Edit. Ambient temp is 74 Fahrenheit pretty much always. AC controlled. Computer sits in a corner under the desk so it gets warmer there but I have a case with 5 fans and it keeps it nice and cool in there. Everything powered by Corsair HX850i PSU.

 

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Following this pattern I never had any day to day problems and running those 24h Prime ultra heating (even old version) tests is a serious case of OCD in my opinion.

 

Yep, agree with you there, this 24 hours of Prime stuff is totally unnecessary as far as I'm, concerned. After many years I've never done that. What's important is that a system is stable for the applications we run. We build PC's to run our applications, we don't builds "Prime 95 PC's".

 

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I was able to push it with HT on for 5-6min without crash @ 1.45 but temps would go to mid/high 90s. Too much for my comfort. Delidding would fix it but I'm ok with it now.

 

Sounds like we're pretty much positioned in the identical place in the silicone lottery. My temp would be more like high 80's though as I'm delidded.

 

For fun, I'll try your settings with HT off and see what happens. Back in a bit...

 

Edit:

Asus 5 GHz OC profile, but with HT off.

 RealBench for 15 mins.

1.408 volts.

Temp = 77 degrees.

Passed!

 

Asus 5 GHz OC profile, but with HT off.

RealBench for 15 mins.  

Volts manually set to to 1.35. (LLC took it to 1.376)

77 degrees.

Passed!

Interesting that there was no difference in temp despite the difference in voltage. Must be due to the limitation of the die/IHS interface, despite being delidded.