Your ThinkSystem wants a 2Rx8 rank module and you keep getting pointed at the wrong stick. Happens more than it should — a 16GB 1Rx4 looks identical in a box but won't populate correctly in your config.
This one's 2Rx8. 2933MHz, 1.2V, genuine Lenovo TruDDR4. It matches the rank and channel layout your server's memory controller expects. You seat it in the correct DIMM slot per your model's population guide, power on, and the POST clears clean.
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| brand | LENOVO ISG |
| category | SERVERS |
| subcategory | LENOVO RAM |
| capacity | 16GB |
| memory_type | TruDDR4 RDIMM |
| speed | 2933MHz |
| rank | 2Rx8 |
| voltage | 1.2V |