Hello everyone,
As a new member, I have read both this thread and the German forum linked here.
Thank you to everyone who contributed to this great thread! I would like to share my experience, which may be helpful.
1. It seems that those who report issues with POST or VGA may be using monitors with HDMI or DP inputs and corresponding adapters. However, most adapters only work one way (HDMI to VGA). Only adapters with additional USB power will provide a picture when using VGA to HDMI.
The absence of a POST signal could also be a long startup process without any audible indication. I tested two motherboards and did not receive any beeps. It is possible that this is a BIOS failure, but I am unsure. When I press the power button on my running Unraid server, I hear a very quiet double beep, indicating that the shutdown process has started.
I experienced the same lack of POST beep with all BIOS versions (F06, F11, F13, F14).
2. After updating BMC and BIOS over IPMI I have tested the MB successfully with various CPUs and APUs, including 3200g, 3600, 5700x, pro 5350ge, and pro 5750ge. I found that the settings for overclocking and power saving differ between CPUs and APUs, as well as between generations.
As my primary APU is pro 5750ge, I have set it to 35W and disabled all PBO and overclocking.
3. I measured the power consumption of my system and found that without OS optimization, it consumes 27W when idle and up to 60W when all devices are on. The HW include 2x32 GB 3200 ECC RAM, 4x 14TB HDDs, 1x SATA SSD, 1x NVMe, and 1x NIC SFP+.
4. I also tested the Asrock x570 phantom 4 and found that it has the same power consumption. However, the standby power consumption on MC12 is 5.5W, which is higher than the 4W on the Asrock, but it is a cost of IPMI.
Asus x570 Proart consumes 35W in Idle and 7W in standby, although there is no IPMI.
I'm currently trying to decide whether to switch back to Asrock or stick with the MC12. While the x570 is a more advanced chip with 3x NVMe and 8x SATA, it unfortunately lacks IPMI, which I'm willing to sacrifice for SATA. Ideally, I would have chosen the ASRock X570M Pro4, but it seems to be out of stock almost everywhere.