@trubok .... welcome here and I appreciate you came here to discuss the issues with the board. I assume you are ralle57 on eBay.
The most of our mainboards are running fine with the bios version 3202. We dont upgraded the firmware.
I have to disagree. All my purchased and 3 exchanged boards came with bios 3107, not 3202. I'm very sure about it. The board with the new issues, I'm not 100% sure about.
In my experience b7 is a problem with the ram.
There might be a misunderstanding. I'm describing an issue where a mainboard came in, bios version not 100% clear, with 4 thermal alerts in the logs. Board was updated to bios 3807 and firmware 1.14.
It was perfectly fine, except that it did not initialize if 4x 32GB DDR4 ram were installed in socket 1. It was initializing successfully with 2x slots populated only with 1x CPU installed or 2x CPUs installed. 4x populated slots with 2x installed CPU's did not work as well. Board was working fine and after one day of running normal test scripts it shut off once. Board did not come up again until several bios & firmware flashes and 50+ attempts to power it up. If the board successfully boots at one point it shuts off after 1+ hours. If you don't wait and reset everything and re-flash the newest bios again, the next time from booting up successfully and shutting off at one point will be short and shorter. I tested with 2x E5 2630v3's I bought from you. Both were cooled down with the purchased Intel 2U fans and/or Noctua U9DX-4i. The CPU's have no obvious temp issue.
RAM tested was (all on QVL list):
2x 32GB SAMSUNG DDR4 2133P M386A4G40DM0-CBP (LRDIMM)
2x 32GB SAMSUNG DDR4 2133P M386A4G40DM0-CBP0Q (LRDIMM)
4x 32GB SAMSUNG DDR4 2133P M393A4K40BB0-CBP (RDIMM)
WELCHEN RAM HABT IHR DENN VERWENDET?
CPU's tested:
4x E5 2630 v3
4x E5 2673 v3
All the same. Even with no peripherals installed. The board has the same issues. The board powers on just to specific points shown by boot code.
Attempt - Postcode
1. doesn't boot up
2. 04
3. 19
4. b0 or 60 (but b0 seems more reasonable)
5-7. b0
8-9. b7 and/or b9
10. boots successfully .. .sometimes it shuts down immediately after posting 'BMC is ready' and you need the 11th attempt.
I think this is what you got wrong. It doesn't stop always on b7/b9.
Before we send a replacement, we test the board for around 6 hours.
All problems started running longer than 6hrs.
Let us know what you think and discuss it with your team. I can make a whole video about everything so nobody can think I'm telling bs.
EDIT: Even a RAM issue doesn't explain why the board, after a shutdown, is not able to come up again and boot up to the next issue. Why the board loses the ability to initialize or is not even able to post anything. If it would attempt to initialize the ram and could not read it due to RAM issues, it would beep. It doesn't until it is able to go beyond postcode 04. And this is possible only with a reflash of any bios or endless poweron attempts.