Installed my new Optimus Foundation block yesterday. Looks to be around a 4deg improvement over my previous EK Velocity block, which is pretty much what I was expecting and lines up with the results a lot of other people are seeing. There are not really any pro reviews on these new Optimus blocks so hard to get good data. Overall I am very happy with the purchase, the quality is amazing and the density of the microfins is impressive, which covers the full Ryzen IHS. A very well made product. However what I am not so happy with, is that after less than 2 hours with the new WB the Thermal Grizzly Kryonaut thermal paste has scratched the shit out of the new block, with also what seems to be significant pitting! Out of the box it was was absolutely perfect with a mirror finish - I had never seen such an impressive finish. But now it looks like it has been used and abused for years after a couple of hours of used and only 1 TIM application! I've emailed Thermal Grizzly support about this, apparently it is known there was a bad batch of Kryonaut going around that had large course particles that made it through. Pretty pissed off that it has done this to my brand new WB. It also did the same to the Ryzen IHS.