i7-9750H Core voltage not applying, everything else is

[ajthenoob]

Hey,

Some reason (no matter the BIOS version, Windows 10 with all virtualization disabled), the Core voltage is pretending to set, but nothing actually applies (hence my example of a 1V offset here). Cache, system agent, etc all apply since when I raise too high it crashes.

Any reason why core only won't set?

 

[unclewebb]

The core and cache are synced internally. You can request a core offset about -100 mV more than the cache. Anything beyond that is ignored.

Typical settings for a 9750H are -125 mV cache offset and -200 mV for the core offset. Do some Cinebench testing. It seems like only some software likes different offset voltages. It seems to benefit software that heavily uses AVX instructions like Cinebench does.

 

[ajthenoob]

Thank you! I will try that out. By the way, if in Cinebench I get no LIMIT warnings whatsoever, what should I further increase to get raw performance boost? I think allcore is locked at a 40x multiplier despite me asking for 45. @unclewebb

Seems like to me there's no difference between offset -1000 and -190 or so. But here's my best CB so far.

 

[unclewebb]

I get no LIMIT warnings whatsoever

That is a good thing. The 9750H has a max multiplier of 40 when all 6 cores are active. The 9750H is not an unlocked K series processor. Any request higher than 40 will be ignored by the CPU. As long as ThrottleStop reports the 40.00 multiplier for an entire Cinebench run, that is as good as it gets.

despite me asking for 45

It never hurts to ask but in this case, it does not accomplish anything. No one has found a way to go beyond the limits that Intel has set.

Setting the turbo time limit to over 3 million seconds does not make any sense. If you want the CPU to run infinitely at the higher PL2 power limit, just set both PL1 and PL2 to the same value, 190. I cannot remember a 9750H reaching 120W let alone 190W so setting both power limits to 120W is probably enough. The standard 28 second turbo time limit works fine, especially when both turbo power limits are set equally. ThrottleStop might let you set some ridiculous values. That does not mean you should. When I see that someone wants 3+ million seconds of turbo boost, I know he has probably been watching some questionable ThrottleStop YouTube guides.

I do not remember anyone with a 9750H or newer CPU ever needing to check the PP0 Power Limit box. I would set that back to 0, set the PP0 Turbo Time Limit to the minimum and clear the check mark out of the PP0 Power Limit box. Press OK. You might need to reboot afterwards just to make sure this is no longer set or being used.

Seems like to me there's no difference between offset -1000 and -190

Most 9750H owners came to the same conclusion. They found some improvement in Cinebench scores or temperatures when increasing the core offset from -125 mV to somewhere around -200 mV. Beyond that, it made zero difference.

When MMIO Lock is checked, there is no reason to check Sync MMIO. You can Lock OR Sync. There is never a reason to do both.

It looks like your 9750H is running great, with a little help from ThrottleStop.

 

[ajthenoob]

Thank you so much for shining light on a lot of these options for me.

It's weird that it's only capped to 40 on load, on idle every core can approach 45 normally.

 

[unclewebb]

The maximum multiplier varies based on how many cores are active. The FIVR window should show this.

Intel designed their CPUs to slow down as more cores become active. You can overclock a K series CPU to get around this limitation. You cannot overclock a locked 9750H.