Why are my 5600x temps at stock settings so high? Kraken X63/Corsair H115i.

[Overtime]

 

I've given up after trying everything I could to lower the temperatures on my 5600x. I have 4 140mm fans on the radiator, I switched from an NH-D15 to a Kraken X63 to a Corsair H115i, bought Thermal Grizzly Kryonaut, reseated the CPU/repasted countless times and even swapped the 5600x with my brother's 5600x.

 

At stock settings, it's around 46-55c idle, and 78 degrees under load. At an OC to 4.6GHz, it reaches around 85 degrees. 4.7GHz hits 91 degrees. I have tried countless things to fix it, and these are extremely high end coolers cooling a very low powered chip, the temperatures shouldn't be hitting 91 degrees under a modest OC.

 

My chip can go up to 4.95GHz (curve optimizer), and I really want to try it out at high clock speeds, but temperatures are way too high and the chip throttles. It also REALLY sucks to spend $200+tax (cad) on a cooler for it to run basically as well as the stock cooler that comes in the box.

 

Does anyone have any ideas on what I could be doing wrong?

Stock Cinebench Run (1.3v)

 

EDIT: My brother's PC (with the same CPU and cooler at the same settings with the same paste) somehow only reaches 62.5c at stock under load? I built them both basically identically, and even then I troubleshooted a ton, so I'm at a total loss.

[glenalz81]

What LLC settings are you running when you overclock?

 

Some motherboards have a tendency under report the voltage. Maybe grab hwinfo64 and check power deviation report under load.

 https://www.hwinfo.com/forum/threads/explaining-the-amd-ryzen-power-reporting-deviation-metric-in-hwinfo.6456/

[Overtime]

5 minutes ago, glenalz81 said:

What LLC settings are you running when you overclock?

 

Some motherboards have a tendency under report the voltage. Maybe grab hwinfo64 and check power deviation report under load.

 

It's fully stock settings, nothing changed. HWInfo64 screenshot is already attached to my original post. LLC is currently set to the 2nd option (very tiny curve upwards), but I think that would reflect in the voltage reading on HWInfo64 if I'm not mistaken. Deviation is 103-107%, motherboard is a B550 Tomahawk.