There is. As Nameless said, the pinouts on a 16 port SLI card is two pairs, skip a pair throughout the block. So pin 17 is port 12.
From memory every 3rd pair was skipped on the 25 pair.
Ie p1, p2, p4, p5, p7, p8 and so on.
You need to find an idcs500 or os500 manual and look in there.
There is no manual specific to those cards
@Carl @Nameless, Thank you for the updates- So if I am understanding you the below mock up would be correct?
(I did find a manual but no mention of layout
Link)
![[Linked Image from i.postimg.cc]](https://i.postimg.cc/B6DsF17g/RJ21-SLI16.png)
