You need to connect slot 1 pin B75 (BR1#) on the edge connector to socket 370 Pin N33

Thank you very much for your help, it really worked and detects 2 processors.
First, I tried with a resistor, simply because it is easier to solder than a wire, board started to post, but I could only see one processor, so I removed the resistor and now it works.

A tad slow to the party, but I have the exact same MB and have modded a Gigabyte slotket to allow for SMP.

bofh.fromhell wrote on 2026-03-03, 10:34:

A tad slow to the party, but I have the exact same MB and have modded a Gigabyte slotket to allow for SMP. […]
Show full quote

A tad slow to the party, but I have the exact same MB and have modded a Gigabyte slotket to allow for SMP.

It's good that it works this way. I noticed that it is very demanding in terms of soldering quality. I re-soldered the connection three times because it was not working stable due to the wire. Everything stabilized with a very thin wire jumper with heat shrink tubing. Probably, the signal is very weak there.

chubabs wrote on 2026-03-04, 08:01:

bofh.fromhell wrote on 2026-03-03, 10:34:

A tad slow to the party, but I have the exact same MB and have modded a Gigabyte slotket to allow for SMP. […]
Show full quote

A tad slow to the party, but I have the exact same MB and have modded a Gigabyte slotket to allow for SMP.

It's good that it works this way. I noticed that it is very demanding in terms of soldering quality. I re-soldered the connection three times because it was not working stable due to the wire. Everything stabilized with a very thin wire jumper with heat shrink tubing. Probably, the signal is very weak there.

Have you recapped the board?
On mine pretty much all caps were even visually bad, but I swapped all caps while I was at it.

bofh.fromhell wrote on 2026-03-04, 15:46:

chubabs wrote on 2026-03-04, 08:01:

bofh.fromhell wrote on 2026-03-03, 10:34:

A tad slow to the party, but I have the exact same MB and have modded a Gigabyte slotket to allow for SMP. […]
Show full quote

A tad slow to the party, but I have the exact same MB and have modded a Gigabyte slotket to allow for SMP.

It's good that it works this way. I noticed that it is very demanding in terms of soldering quality. I re-soldered the connection three times because it was not working stable due to the wire. Everything stabilized with a very thin wire jumper with heat shrink tubing. Probably, the signal is very weak there.

Have you recapped the board?
On mine pretty much all caps were even visually bad, but I swapped all caps while I was at it.

All the capacitors on it looks in perfect condition, so I think it's been stored for a very long time. In connection with the fact that it has a defect, all 3 pins for connecting coolers do not work, and if connect them to MB, it freezes in the BIOS when removing the RPM values, because it is simply waiting for a signal that is not there, but if you don't connect them, everything works .
Most likely, the transistor that controls them has died, but there is also a possibility that it is the super I/O. However, I have not noticed any issues with its functioning, and I am not knowledgeable enough to find this transistor and replace it. Otherwise, it is in perfect condition, as if it had just been taken out of the box. But I plan to replace all the capacitors with polymer ones.