BSOD after half an hour of gaming

[Not-A-Myth]

I set up an undervolt and underclock on my i5-9300H CPU (laptop).
I set its max boost to 3.3 GHz (from 4.1 GHz).
The offset voltage for the CPU core I set is -250 mV and that of the cache is -165 mV.
I ran the TS benchmark, which came up with zero errors and the temps are mostly below 75°C.

But after a period of heavy usage such as gaming for half an hour or so, I get the Blue Screen Of Death. This has happened twice.
Is my undervolt not stable? should I decrease the offsets?

I'm attaching the log file before the latest crash. It has data up until the point of crash. Nothing seems out of order to me but you know better @unclewebb

 

[unclewebb]

Is my undervolt not stable?

No one else is reliably running that big of an undervolt on that CPU. When you lower the CPU speed, you usually need to reduce the size of the undervolt. When your CPU temperature is only 75°C, why are you locking your CPU to such a low speed?

About -130 mV for the cache and -175 mV to -200 mV for the core will probably be stable. Do some Cinebench testing to see if the big CPU core undervolt you are requesting is improving performance. You will reach a point where using a really big core undervolt does not make any difference.

The TS Bench is just one basic test. If you are not game stable then you are not stable.

 

[Not-A-Myth]

No one else is reliably running that big of an undervolt on that CPU. When you lower the CPU speed, you usually need to reduce the size of the undervolt. When your CPU temperature is only 75°C, why are you locking your CPU to such a low speed?

When my temps reach 85 or more, I think the jittering in my games increases the longer I play it(even though temps don't reach 92). I see more and more frame drops and such after some time. I checked the "Limit Reasons" window, but there were no boxes lighting up.
I didn't know what to do so I just decreased the clock to get the temps down to see if that worked. And it did work for some reason.

Do some Cinebench testing to see if the big CPU core undervolt you are requesting is improving performance. You will reach a point where using a really big core undervolt does not make any difference.

So how exactly do I do this? The higher score I get the better it is right? And if my CPU thermal throttles, how low does the clock speed become?

The TS Bench is just one basic test. If you are not game stable then you are not stable.

I understand. Thank you.