G4 Xserve Cluster Node Question - AGP?

[beigeballin]

Question for anyone with hands-on G4 Cluster Node (M9090LL/A) experience.

The standard Xserve G4 has a combo PCI/AGP 4X slot (for the video riser or 2nd Gigabit card) alongside its two 64-bit PCI slots. The Cluster Node ships without that slot and is marketed as lacking it, Apple's own docs just say "No AGP slot available."

What I can't confirm: is that connector physically missing on the board, or present but only wired for PCI (not AGP signaling)? Looking at documentation/pictures, the slot is there just without a riser. Has anyone actually tried plugging an AGP/AGP riser (like the 922-5250)/AGP riser cable into a Cluster Node's slot to test compatibility? Trying to figure out if this is "just needs the card" or "board can't do AGP, period." Thanks!

 

[joevt]

I don't have a Xserve (Cluster Node) to verify the following information:

Both Xserve (Slot Load) and Xserve (Cluster Node) have Logic Board 661-2741 according to Xserve service source.
http://www.applerepairmanuals.com/the_manuals_are_in_here/XServe.pdf
One website says this is board ID 820-1463-A?

The Xserve (Cluster Node) and Xserve (Slot Load) have Dual-Slot Riser Card 922-5847.

Only the Xserve (Slot Load) has the Single-Slot Riser Card - which is one of these:
AGP/PCI Single-Slot Riser Card 922-5166
AGP/AGP Single-Slot Riser Card 922-5250

The pictures of the Xserve (Slot Load) and Xserve (Cluster Node) logic boards are identical and both have the Single-Slot Riser Connector.

The schematics for the Logic Board 661-2741 may exist at www.badcaps.net?

Both Xserve (Slot Load) and Xserve (Cluster Node) have model id "RackMac1,2" and code name "Q28".

"RackMac1,1" is "P69", "Xserve G4 1.0 GHz"
"RackMac3,1" is "Q42", "Q42B", "Xserve G5 (PCI-X)"
There might be a "RackMac5,1", "Q42C"