I got in the BMCWebGui. At first i tried with firefox browser, and i could not flash the bios, the browse button to upload the bios was not responding. Then i tried with the Chrome browser (as recommended by RolloZ170 in pm). The flashing to bios 1.03 as well as beta bios 10.10 seemed to work. But after a power cycle (several ones naturaly). still no change, any new, bios 1.03 or 10.10 also do not show up in the ipmi anywhere.
Overall no progress. still error F.F. I tried dozens of things. cmos resets, with and without battery, booting with and withoug without battery, booting without any components except memory and cpu. Booting with cpu only. Different psu. reseating ram, cpu, tried 2 different cpu's, both Q0J3. All the same results. i tried1 some more cmos resets, another psu.Different Jumper settings, bios over ride, ME_recovery the 3 jumper setting variations that i found in the manual that seemed to make sense to me.
The only small change i got was when installing also the second cpu and or vga card. Then the ff code did not come almost instantly like 1 second after power on as always but the led error code display stayed of for a while, and the board forced some sort of resets itself. i heared the relais of the psu clicking, then it tried to boot for 5-10 seconds then again psu relais clicking. after 3-4 resets or retries, by the board itself ( i only powered it on, it stayed off (in stand by) after another try, (me pressing the power button) the same/similar happened some restarting, without any error codes, and then after 3-4 auto resets, the ff code came, and did not dissapear again

. Also not after other restarts. Removing the second psu, or vga card, resulted in almost immediate ff code as any of all the booting attemps before.
Normally i would guess faulty motherboard, but with these ES cpu's who knows, maybe its still a compatibility issue.
Out of curiosity i tried to boot without cpu. Then i do not get the FF error code, but also nothing more happens. It seems just in standby with some green lights, but no errors or beeping. Also no errors in the ipmi log.
When i tried with the QYFS (D0) i got code FF exactly the same behavior as with Q0J3 (E0).
In the ipmi, there are no errors, on the other hand it shows no cpu information. there are no red lights no beeping, things sound pretty normal. Board and box look undamaged. Honestly the board is beautifull it would fit 2 noctua 140 air coolers, a lot of pcie cards but it is not going to make me happy if it does not run these ES cpu's. Maybe the cpu's are also faulty both although that is probably unlikely. But what is unlikely, is conditioned to the fact that some unlikely event already occurred. I already searched the manual and many forums for ff code. resulting in what i tried described above. I am getting out of idea's and hope to get this working. In retro spect i should have maybe first tried this cpu on a Asrock single socket board, that is available in europe, because i ordered this one from the US, and it will be a headache to return it in time.
Any suggestions about what to try or do are welcome!
I will also try to post in some other forums, to get some more ideas.