Did the board work prior to the BIOS update?

PcBytes wrote on 2025-06-28, 14:56:

Did the board work prior to the BIOS update?

Exactly. It worked very well before the update. I wanted to update it to install a Pentium III 500MHz processor, since I had the BIOS version 2AA2 as standard.

Because the D6IBA had a few variants, the bios file you used may be the wrong one for a true rev 2.0 board. Are you sure you have a true Rev 2.0 ? Can you take a picture ?
From Soyo USA archive last bios for a Rev 2.0 is "D6IBA-2 BIOS files
bd2-2ca2.bin checksum: 2645 release date: 07/05/2000 BIOS revision: BD2-2CA2
Changes: Fixed the multiplier to 8."
Attached. Note: from Hex Work shop: bd2-2ca2.bin - check sum 16: 2465

added: bios 2AA2 appears to be the first release followed by 2aa3, 2ba1, 2ba2 and last 2ca2...

Horun wrote on 2025-06-28, 16:41:

Because the D6IBA had a few variants, the bios file you used may be the wrong one for a true rev 2.0 board. Are you sure you hav […]
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Because the D6IBA had a few variants, the bios file you used may be the wrong one for a true rev 2.0 board. Are you sure you have a true Rev 2.0 ? Can you take a picture ?
From Soyo USA archive last bios for a Rev 2.0 is "D6IBA-2 BIOS files
bd2-2ca2.bin checksum: 2645 release date: 07/05/2000 BIOS revision: BD2-2CA2
Changes: Fixed the multiplier to 8."
Attached. Note: from Hex Work shop: bd2-2ca2.bin - check sum 16: 2465

added: bios 2AA2 appears to be the first release followed by 2aa3, 2ba1, 2ba2 and last 2ca2...

I actually think it's 2.0, since I saw it on the Retro Web page because of the BIOS name. I don't know if there are any other versions besides 1.0 and 2.0. I'm attaching photos of the BIOS when it was working.

Rev 1. As noted, rev2 would have had BD2, not BDB.

yes agree rev 1. There is Rev1 A and B and Rev1 D.. There is some confusion as to which BIOS in the archives.
This: https://web.archive.org/web/20000412132534/ht … yo.de/d6iba.htm
says BDB-2AA2 is for D6IBA BDB (7880 B) BIOS, then months later
this https://web.archive.org/web/20000607194916/ht … yo.de/d6iba.htm
says D6IBA BDB (7880 B) BIOS files: bd-2ca1.bin
attached, try it

Thank you very much for your efforts and quick responses to the problem I had. Now the motherboard works wonderfully, but I don't understand why it won't recognize my 1GB (256x4 CL3 ECC) and why it recognizes the motherboard with such a low CPU speed.

It also recognizes half the size in MB of any RAM I install.

DonPipe wrote on 2025-06-30, 02:09:

Thank you very much for your efforts and quick responses to the problem I had. Now the motherboard works wonderfully, but I don't understand why it won't recognize my 1GB (256x4 CL3 ECC) and why it recognizes the motherboard with such a low CPU speed.

It also recognizes half the size in MB of any RAM I install.

The attachment 20250629_213231.jpg is no longer available

Have you set the DRAM data integrity mode in the BIOS (ECC / Non-ECC)?

Yes in the manual it says you have to set the DRAM to ECC in the "Chipset Features" part. Also 66Mhz is the default cpu clock, you have to manually choose 100Mhz (in your case 500mhz (100*5)) in Combo Setup part...