I have never liked the cheap plastic material of Thermal Grizzly AM5 Mycro Direct-Die Pro even though I had decent CPU temps for overclocking.
After the switching SuperCool Direct-Die (Full Copper) my CPU idle temp lowered 4C straight, without doing anything. The CPU temp difference reaches 7-8C at full load, comparing to TH Mycro. I use MORA IV 600 for cooling the system.
I absolutely loved the product quality, even though I had questions about the compatibility before ordering it. There is only one negative side, SuperCool Direct-Die requires dismantling the block before the installation. This was quite new to me.
Cross post to /overclocking and /watercooling. 2nd-3rd photos from the manufacturer's website.