Hello Everybody,
i need help, Count me in on this problem. I tried everything. Rig works from USB on HIVE, with d1800 btc onda motherboard the first 2 slots give me the big red X.
i ran the cards and risers in other slots and they are fine. Both . Both same problem. Slot 1 and 2 are dead. Not sure what to make of it
Tnx
One of my rig running on Onda d1800 too , i`m guessing your mb pcie slots not working.
My rigs are running fine on those board using hive.
I have 100+ ONDA D1800 Boards. Every one of them has the same problem and will not mine on the first 2 card slots. All 6 GPUs mine correctly with ETHOS and Windows.
I finally found a solution after running into the same problem. Updating the bios fixed it. Which really sucks for you that have 100+ machines out there. ONDA website is not easy to use and didn’t work for me to download the bios so I recommend getting filezilla and connecting to the ftp site with that. If you need more details let me know.
What BIOS version did you use, did you change any BIOS settings?
I updated the BIOS to OBT8P320.bin as it was the latest available on the ONDA website: http://www.onda.cn/MotherBoard_Supports.aspx?id=369
D1800 BTC/ D8P -D3 PXE BIOS [BIOS]
Description: This BIOS universal D1800 BTC 6 card 8 card mine board optimization graphics card
is enabled by default LEGACY mode without disk
Updated: 2019-07-03
Still, HIVE OS detects all 6 cards but refuses to mine on the first 2 slots, only the last 4 slots mine correctly.
i used the bios that says for vega and then i loaded default settings in the bios … it should be default but i did not use the internal graphics… when i load that bios hiveos doesnt even say that the board is onda anymore
also i have 6 rx580 in mine and just like you it didnt mine the first two cards til i did the bios update
please provide a link to a good BIOS
I will post one tomorrow. I won’t use the onda website link bc wasn’t reliable for me.
ok link below
so after you download this bios you will have to download rufus and make a dos bootable usb drive.
then once you boot to the usb bootable drive with these files on it all you need to do is type f then hit enter and answer yes to the next question and the bios should only take a minute or so to complete.
let me know if you have any questions but there are tutorials online better than i can explain it
also if you guys are still having trouble make sure you motherboard says version 1.0 on it bc i am told this bios is for version 1.0 but I havent seen motherboards like this style that arent version 1.0
If all of that doesn’t work then turn off internal graphics and use the first card for a monitor if you need a monitor on the machine.
same issue… are you tested and its worked?thx
Yes it works but always be careful when flashing bios bc if you do it wrong or it is interrupted the motherboard will be useless. Some motherboards have removable chips but this one does not.
Thx can you gives me the step please really afraid to do that now… 
I do the bios update now only the 2 first pcie works. Any idea? Help please
I have the same issue - that only the first two PCI-ports work. Did you find a solution?
I figured it out, if anyone is struggling with the same problem here is my solution:
Works perfect after that!
I made a usb stick with rufus to a freedos usb stick.
After putting the 3 files on the usb stick and turn on the D1800btc I become a issue like …
could not locate 'efibootbootx64 efi
What I do wrong,
Can anybody help me.
Btw we have more like 100 mb from the D1800BTC too……
hello, i’m trying to update my onda d1800btc v1. made a freedos usb, installed it to a little ssd in the m.2. boot to freedos, use cli to goto usb and dir with bios files. run F. get error:
JemmEx: exceptio 0D occured at CS:EIP=21CF:000000AE, ERRC=00000000 SS:ESP=2AAD:0000AAD8A EBP=0000ADA8 EFL=00033002 CR0-80000013 CRZ=00000000 EAX=00021D02 EBX=0000002A ECX=51D80064 EDX=41D80064 EDXBFEB2A01 ESI=00003E96 EDI-00003E96 DS=2AAD ES-2AAD FS=0000 GS=F000 [CS:IP]=2E 0F 01 16 2A 00 0F 20
I have no idea what any of that means, or how to make it do the bios update. if other info is needed, lemme know and i’ll try to provide it. any suggestions would be appreciated. thanks!
also, sorry fot the thread jacking. 
Hi, I tried updating the bios but I can’t boot into the usb. When I connect it I can only get into the bios. Do you guys have any suggestions?