[jjw822]

Coming from 3570k so it is a big step up.
Been watching and reading about all the new parts and trying to learn the new hardwares.
So these are my new set up

Cpu 14700k
Motherboard ASUS ROG Strix Z790 -H
RAM - G.Skill trident Z5 DDR5 cl32
Cooler - Arctic freezer II 360
Power - MSI MPG A850

With everything stock, on Cinebench R23, if I remember correctly it was hitting 85 C
with AI over clock, it briefly hit 100C

So I followed the guide from RobertoSampaio's 13900K and 14900K undervolting guide.

PL1 and PL2 was set to 125 and 253 respectfully
LLC#4
DC_LL 1.02
AC_LL 0.2
voltage limit to 1700

and ran cinebench R23 with HWmonitor on.
I remember from 3570k overclocking, if system was stable, it would crash so I knew it was unstable.
Here is the real question, me thinking that it was all stable since it did not crash i was lowering AC_LL by 0.1 but found out when cinebench starts p cores are at 5500MHz and temp never when above 80 degrees. HOWEVER, all of sudden clock speed goes down to 4400MHz. Is this what it means to be unstable?

I could not find answers anywhere if cinebench was supposed to run at full load or this is normal.

please help

Thank you

 

[ahoypolloi]

Coming from 3570k so it is a big step up.
Been watching and reading about all the new parts and trying to learn the new hardwares.
So these are my new set up

Cpu 14700k
Motherboard ASUS ROG Strix Z790 -H
RAM - G.Skill trident Z5 DDR5 cl32
Cooler - Arctic freezer II 360
Power - MSI MPG A850

With everything stock, on Cinebench R23, if I remember correctly it was hitting 85 C
with AI over clock, it briefly hit 100C

So I followed the guide from RobertoSampaio's 13900K and 14900K undervolting guide.

PL1 and PL2 was set to 125 and 253 respectfully
LLC#4
DC_LL 1.02
AC_LL 0.2
voltage limit to 1700

and ran cinebench R23 with HWmonitor on.
I remember from 3570k overclocking, if system was stable, it would crash so I knew it was unstable.
Here is the real question, me thinking that it was all stable since it did not crash i was lowering AC_LL by 0.1 but found out when cinebench starts p cores are at 5500MHz and temp never when above 80 degrees. HOWEVER, all of sudden clock speed goes down to 4400MHz. Is this what it means to be unstable?

I could not find answers anywhere if cinebench was supposed to run at full load or this is normal.

please help

Thank you

Tune with Intel XTU. It tells you why it is throttling. PL throttling. Current throttling. Temp throttling.

Start with stock voltage and keep decreasing offset until it cant pass bench, then move on to stress testing.

Once you find the values that work in XTU, translate them into your bios.

 

[jjw822]

Tune with Intel XTU. It tells you why it is throttling. PL throttling. Current throttling. Temp throttling.

Start with stock voltage and keep decreasing offset until it cant pass bench, then move on to stress testing.

Once you find the values that work in XTU, translate them into your bios

Okay I will try that too. I watched jayztwocents youtube video.
I was hesitant bc I saw couple posts that no need for XTU

 

[s1rrah]

Coming from 3570k so it is a big step up.
Been watching and reading about all the new parts and trying to learn the new hardwares.
So these are my new set up

Cpu 14700k
Motherboard ASUS ROG Strix Z790 -H
RAM - G.Skill trident Z5 DDR5 cl32
Cooler - Arctic freezer II 360
Power - MSI MPG A850

With everything stock, on Cinebench R23, if I remember correctly it was hitting 85 C
with AI over clock, it briefly hit 100C

So I followed the guide from RobertoSampaio's 13900K and 14900K undervolting guide.

PL1 and PL2 was set to 125 and 253 respectfully
LLC#4
DC_LL 1.02
AC_LL 0.2
voltage limit to 1700

and ran cinebench R23 with HWmonitor on.
I remember from 3570k overclocking, if system was stable, it would crash so I knew it was unstable.
Here is the real question, me thinking that it was all stable since it did not crash i was lowering AC_LL by 0.1 but found out when cinebench starts p cores are at 5500MHz and temp never when above 80 degrees. HOWEVER, all of sudden clock speed goes down to 4400MHz. Is this what it means to be unstable?

I could not find answers anywhere if cinebench was supposed to run at full load or this is normal.

please help

Thank you

Hey there...

Try downloading the PDF bios overview that I link to in THIS POST. It's the link in the third paragraph with the link title "download this .PDF overview." I also linked to the same PDF file archive in that last sentence (so redundant! lol). The PDF "guide" is just a set of bios screenshots showing the settings I use for an all-core overclock with a .100mv - .150mv undervolt.

Your Strix Z790-H bios should be almost identical to the Strix Z690-E MB bios I was using at that time so it should not be a difficult process (10 minutes?); before replicating the settings discussed in the PDF file, be sure to reset your current bios to optimized defaults. From there, just go through each of the ten or so bios screenshots/pages in the PDF and replicate the settings exactly. Double-check everything to make sure it's all as shown. As mentioned in the PDF guide, I left everything else in the MB bios at default settings.

You're using a 14700K and I was using a 13900K when I put that PDF overview together so use p-core and e-core speeds appropriate to your 14700K CPU when setting up the bios; for the 14700K, I would start with a p-core speed of 5.6ghz and an e-core speed of 4.3ghz which I believe are the stock p/e core turbo speeds for the 14700K.

In the PDF guide, I'm using a 57p/45e all-core overclock example. So when replicating the settings in your Z790-H MB, simply substitute 56 for any place you see me specifying 57. Similarly, use 43 where you see me use 45 for the e-cores. Pay careful attention to the last few pages where I show/discuss setting the static VCORE and undervolt settings; that is the most important section but it's rather simple and I included handy notes along the way that should be enjoyable for just about anybody who might read them lmao.

I've used that same bios config for 8 months without changing a single thing. It's basically just a very simple all-core overclock bios config with the best undervolt I could test stable with my 13900K at that time; the same exact bios config works for any all-core overclock I want to run, be it 55p/43e ... 56p/44e ... 58p/46e or otherwise. The only thing I change in bios if running a different all-core overclock is making the obvious adjustments to the main static VCORE and slightly backing off of the undervolt a bit if using a 58p/46e overclock.

Several other OCN pals of mine with 13900K(S) chips have also worked with me on replicating/testing all of our rigs with the exact same settings as discussed in the PDF file. We also discussed and used the exact same benchmark tests. Across four different 13900K/KS rigs, all of us showed nearly exactly the same final test results (we used CBr23 5min or 10-minute loops). Most of those folk were using either Z690 Hero or Apex MB's but we all used i9 13th gen CPU's.

After we had ensured we were all using the precise same bios settings (as shown in the PDF guide) and after running the exact same benchmark test, it was amazing how nearly identical our overall systems performed when looking at the HWINFO data. We were all within 5w to 10w of each other in regards to max power draw which was pretty neat to actually collaborate on and see in action. The most valuable data from that bit of collaboration was establishing that the bios settings were, at the very least, dependable.

So those bios settings work and have been tested by myself (every day for 8 months) as well as several other users here at OCN who I would respectfully describe as, "not dumb" . I can't say it's the most brilliant way to set up an i7/i9 13th or 14th gen CPU but I can say that the settings work. So give it a shot yo.

BTW ... just a few days ago, I built a second rig using a 14900K and a Z790 Apex Encore MB; I plugged the exact same bios settings discussed in that PDF into the new 14th gen Z790 Apex bios and once again, I saw almost identical results (power/test results/etc.) as I did when using the settings on the 13th gen rig. There were some slight differences between my OG Strix Z690-E gaming MB bios and the new Z790 Apex MB bios but I simply started with the default Z790 Apex bios settings and punched in the bios values as shown in the PDF while ignoring everything else. The new Z790 Apex MB bios has a lot of new and strange witchcraft in it that I don't know anything about so I treated it like I do any sort of strange, new magic (ie: "DON'T F##K WITH IT!" lol).

I'd be curious what sort of results you see so post some data if/when you decide to try the settings.

Best of luck mate...

~s

 

[gerardfraser]

Okay I will try that too. I watched jayztwocents youtube video.
I was hesitant bc I saw couple posts that no need for XTU

He is a simple undervolt from a real user with normal AIO 360MMM.I does not get more simple than this. Set and offset voltage on ASUS board and adjust CPU by core usage with a core ratio limit.

So 14700K be reasonable set 58 58 57 57 56 56 55 55 P-Cores and test with offset of -0.015 ,if you pass lower offset.Test again until failure.
and then set E-cores but 44/43 is fine for normal use.You do not have the best cooling for Intel cPU at heavy loads,so do not expect miracles,you do not have the best motherboard.Youy did not say your use case but above suggestions is for normal PC use with PC gaming focus.

Here is a video with simple BIOS settings any nut can use

 

[s1rrah]

Okay I will try that too. I watched jayztwocents youtube video.
I was hesitant bc I saw couple posts that no need for XTU

BTW: I also include some XTU profiles in that same post I linked to above. Personally, I don't use XTU much and prefer to simply work in bios but XTU can be a handy testing tool and I have def used it in that regard on certain occasions. But I would recommend setting XTU aside if investigating the bios settings shown in the PDF file. XTU is not a bad tool at all but I think you will learn more and have a better understanding of how your system works if starting with working in the bios first.

FyI.

~s

 

[jjw822]

Youy did not say your use case but above suggestions is for normal PC use with PC gaming focus.

my case is Lian Li 011 evo, side intake, bottom intake, rad on top. each side have 3 Arctic p12s.

Thanks everyones help. I guess everyone have different methods for doing these. both of you guys doing it without touching AC_LL and DC_LL. and other posts on reddit and RobertoSampaio's guide starts everything with AC_LL and DC_LL. I don't want to offend anyone here but why completely different approach? just trying to learn here

 

[ahoypolloi]

BTW: I also include some XTU profiles in that same post I linked to above. Personally, I don't use XTU much and prefer to simply work in bios but XTU can be a handy testing tool and I have def used it in that regard on certain occasions. But I would recommend setting XTU aside if investigating the bios settings shown in the PDF file. XTU is not a bad tool at all but I think you will learn more and have a better understanding of how your system works if starting with working in the bios first.

FyI.

~s

XTU tells why the system is throttling. It is very clear and you can quickly test values, which is why I suggest.

 

[charonme]

I also start with AC_LL, DC_LL and very important also LLCC. DC_LL lowered to the lowest value to make the power reading as close to reality on my MB. AC_LL and LLCC determine the base voltage for different frequencies from which then an offset can be subtracted.

About your original stability question: you'll see frequencies dropping if there is some throttling limit in effect, for example the temperature, current or the power reading reached the set limit.
Instability would be your testing application showing you an error, or a crash, or BSOD, a freeze or a reboot.

I use mainly prime95, linpack extreme and y-cruncher for testing stability. I've had some of these throw an error after 7hours of running without problems, so a couple of minutes or 2h is probably not enough

 

[Artjsalina5]

I also start with AC_LL, DC_LL and very important also LLCC. DC_LL lowered to the lowest value to make the power reading as close to reality on my MB. AC_LL and LLCC determine the base voltage for different frequencies from which then an offset can be subtracted.

About your original stability question: you'll see frequencies dropping if there is some throttling limit in effect, for example the temperature, current or the power reading reached the set limit.
Instability would be your testing application showing you an error, or a crash, or BSOD, a freeze or a reboot.

I use mainly prime95, linpack extreme and y-cruncher for testing stability. I've had some of these throw an error after 7hours of running without problems, so a couple of minutes or 2h is probably not enough

I wouldnt recommend any of those for this generation. If you do, make sure to adhere to intels power limit. OCCT should be enough.