The AS-4125GS-TNRT2 is a 4U rackmount server designed for high-density GPU configurations, and PCIe expansion. Expansion slots are managed via dedicated riser cards.

AOM-PTG-I2T-P is the riser card using in Supermicro AS-4125GS-TNRT2 server.  

1. AOM-PTG-I2T-P (Riser card) Installation
   

1. Power down the system and open the chassis cover
   
2. Remove the Add on cards and find the Slot A1 in the Mother board. Slot A1 is the slot for AOM-PTG-I2T-P riser card in the server As-4125GS-TNRT2.
   
3. After Installation we can find the details of the riser card in Baseband management console .
                 Fig. shows the Riser card slot in the Motherboard H13DSG-O-CPU
   
   
   
   

2. AOM-PCIE5-418P-1-P PCIE Expansion card Installation.
   

1. AS-4125GS-TNRT2 chassis supports up to 10 double-width GPUs, with up to 13 PCIe 5.0 x16 slots available depending on configuration.
   
1. Supported PCIE cards 
   
2. GPUs- AMD MI210,NVIDIA H100 , H100NVL , L4 , L40 and others networking cards -AOC-957508-P2100G-WW001  NIC Cards and other AIOM/OCP 3.0 Expansion & RAID Controllers.

                                 Fig:-  AOM-PCIE-418-1-P Daughter board used in server AS-4125GS-TNRT2

Installation Procedure :-

1. Shut down the server and remove power cords.
   
2. Remove the chassis cover. Do not power on server without its cover for airflow reasons.
   
3. Locate and prepare the PCIe Expansion slot in MB.
   
4. Install the Expansion card-  Align the card's connector with the PCIe slot Gently insert the card into the slot until fully seated.
   
5. Secure the card with screws.
   
6. Connect Auxiliary power - For GPUs and other high power cards.
   
7. Reinstall the chassis cover.
   
8. Power Up the server to check the PCIe Expansion Card is recognized and performs as expected.