You need four 25GbE uplinks and you don't want to pay the premium for a different chipset when Broadcom's doing the job. The 57504 drops into your ThinkSystem PCIe slot, gives you four SFP28 ports at 10 or 25GbE each, and gets out of your way. Same four-lane throughput as the pricier options. Same Lenovo ISG build and ThinkSystem support. If the spec sheet says 'four SFP28, 25GbE, PCIe' and that's all you need, this is the card that gets it done without the extra line item
| brand | LENOVO ISG |
| model | Broadcom 57504 |
| part_number | 4XC7A80566 |
| port_count | 4 |
| speed | 10/25GbE |
| cage_type | SFP28 |
| form_factor | PCIe |
| category | Servers / Network Cards |
| platform | Lenovo ThinkSystem |