Help Overclocking i9 9900K

[TootY]

Hi all,

 

I'd like to ask for peoples input and support on helping me overclock my i9 9900K. Please see my PC specs in my signature. I've been looking at numerous guides and videos trying to understand what should and be shouldn't be changed and I'm at the point I don't know now.

 

At present I'm running with only the following changes within the BIOS:

 

XMP: XMP II

BCLK: 100 (Default)

CPU Core Ratio: Sync All Cores

ASUS MultiCore Enhancement: Disabled

1-Core Ratio Limit: 50

CPU Core/ Cache Voltage: Adaptive Mode

Additional Turbo Mode CPU Core Voltage: 1.29

 

These are the only changes within the BIOS I have made. Now I've been playing numerous games for around 1 week now with no problems at all, however, I'd like to go further and see if I can drop lower but I'd like to do a 'Stress Test'- I'm facing an additional possible problem is that the CPU will throttle it's frequency when running RealBench, AIDA 64 and Prime95 26.6 which I can't understand why.

 

Temps aren't going above 65c on a custom water-cooled loop so I don't suspect it to be a thermal issue, I suspect I need to adjust additional settings maybe or tweak how the applications run? Is this throttling down due AvX?

 

I've also read here that it could be something to do with MCE? I'm not sure what this is, some that handles how much power is allowed for the CPU. I've seen mine go from 125W and when the throttle comes in it's back to 95W which is the TDP.

 

Is there something within the BIOS I need to change for this to stop happening?

 

Thanks,

 

[TootY]

Ok, so I found it was caused by MCE- I have now enabled this setting and the frequency did not drop like it used to.

 

Please see attached a quick 10-minute test, I want to know the following:

 

Should I drop the Core Voltage down further as CPUID is showing a voltage of 1.261?

Furthermore, should I adjust CPU Load0Line Calibration at all?

 

My ambient room temperature is 26.1 with the pump running at 4100RPM and all fans at 1600RPM (not max)- Thoughts on temperatures at present?

 

Coolant temperature at 31c - I do normally have the room around 19/21c but I've just got back so I have no AC on at the moment.

 

[Krunkkracker]

8 hours ago, AJLedbetter123 said:

Ok, so I found it was caused by MCE- I have now enabled this setting and the frequency did not drop like it used to.

 

Please see attached a quick 10-minute test, I want to know the following:

 

Should I drop the Core Voltage down further as CPUID is showing a voltage of 1.261?

Furthermore, should I adjust CPU Load0Line Calibration at all?

 

My ambient room temperature is 26.1 with the pump running at 4100RPM and all fans at 1600RPM (not max)- Thoughts on temperatures at present?

 

Coolant temperature at 31c - I do normally have the room around 19/21c but I've just got back so I have no AC on at the moment.

 

By enabling MCE, you have unlocked the TDP limits of the processor which was probably causing it to throttle. You can also find wattage/amp/etc limitations in your bios and set those to max settings to do the same thing. 

 

To accurately see the voltage value, use the VROUT sensor reading on HWinfo. Drop the voltage if you can but definitely check that your system is stable with realbench/latest prime95/aida for several hours a piece. Also only drop load line calibration is already stable since there's no reason to give it more voltage than it needs.

 

Just be aware that silicon lottery needs 1.3v at avx offset at -2 just to be stable for their 2nd best 9900k's. The last thing you want is one of the many games that use AVX to crash your system or a windows update corrupting your system. 

 

Your temps look great and that should give you more headroom than others have. 

[TootY]

5 hours ago, Krunkkracker said:

By enabling MCE, you have unlocked the TDP limits of the processor which was probably causing it to throttle. You can also find wattage/amp/etc limitations in your bios and set those to max settings to do the same thing. 

 

To accurately see the voltage value, use the VROUT sensor reading on HWinfo. Drop the voltage if you can but definitely check that your system is stable with realbench/latest prime95/aida for several hours a piece. Also only drop load line calibration is already stable since there's no reason to give it more voltage than it needs.

 

Just be aware that silicon lottery needs 1.3v at avx offset at -2 just to be stable for their 2nd best 9900k's. The last thing you want is one of the many games that use AVX to crash your system or a windows update corrupting your system. 

 

Your temps look great and that should give you more headroom than others have. 

 

Thank you for the informative response. 

 

Would you suggest running two sets of stress testing? One which doesn't use AvX and one that does use AvX to test the stability of both. 

 

If so, I will do a 1.29 Voltage test and see if it passes.

 

Would you recommend using an offset of -2 for a 4.8GHz OC for AvX?

[Krunkkracker]

On 7/30/2019 at 5:30 AM, TootY said:

 

Thank you for the informative response. 

 

Would you suggest running two sets of stress testing? One which doesn't use AvX and one that does use AvX to test the stability of both. 

 

If so, I will do a 1.29 Voltage test and see if it passes.

 

Would you recommend using an offset of -2 for a 4.8GHz OC for AvX?

I would only use an avx offset if it is unstable with an avx stress test.  Games these days use it pretty commonly so you want that performance.  

 

Avx and non avx would be perfect. With your temperatures, you can even use prime95 with avx which many can't run because it thermal throttles but it will definitely show if there are any instabilities.