Ive gone round and round with temps dont let them fool you, i can see improvements when using these boards the cooler they are the faster they run.
Now just because they say “throttling doesnt start till yada yada temps” you have other components on these boards and they are affected by heat also.
Most of us run the CPU with little pads that connect the ram, and memory chips to the CPU so if the CPU is running at 40-50C then that means the ram and memory is too and it ALL matters in the end. You cool the CPU but leave the memory running hot you STILL have resistance.
If heat didnt matter why even run a heatsink at all? why add a fan? why are they just now releasing a larger heatsink? why is there a DIY case with “metal plate” and without?
Why is there a 5mm gel pad you can add to transfer heat from the BACK of the board to the metal plate? BECAUSE it all matters!! All these little things add up to an end result
Think of it like a race car, you cant run a super engine and bald tires, you cant run a super engine and good tires with no suspension, you cant run a super engine, good tires, good suspension and a poor driver.
What ive found is you need to keep the temps as low as you can with out the device ramp up in temps quickly. If you see temps slowly ramping under load your cooling isnt enough, if they jump quickly thats worse the longer you can hold the temps low the better like a large dense sink will take longer to heat it up so the temps dont ram up and down the slower they ramp the better.
The larger passive sink they are releasing will be good but adding a fan to the larger sink will be better