Great! thank you for your post, very usefull!I've used both vendors EPYC boards. I'd like to add:
H11/H12 DSI are fine in desktops for VRM temp with 240W processors. I am using 4U Supermicro coolers and a fair amount of 140mm intake and exhaust fans in the 1000 RPM range (so fairly quiet), with no shroud.
the Supermicro fan control SUCKS. needing to use IMPI scripts or constant speed fans. You can get rid of the alarm on low RPM for fans, but many fans run at like 200 RPM because the default 4 pin PWM control speed is like 20%. it has no ability to control 3 pin fans and 4 pin frequently run too slow. I instead prefer to use only 4 pin on the CPU with good speed fans (like the SMC 4U coolers are 1000 - 3500 RPM range) and 3 pin (which run 100% all the time) for all the rest. I just tune my fans by buying the right speeds for my application (1000-1500 RPM @ 140mm typically).
I keep buying SMC, but in truth I kind of liked my gigabyte experience a little more.
I'm kind of nudging towards the Gigabyte at the moment (not 100% sure why) just wondering about the difference in BMC chip.
the AST2600 on the SMC seems like a big upgrade when compared to the AST2500 on the Gigabyte