| C-Series M3 | Approx. 2012–2014 | C220 M3, C240 M3, C460 M3 | Xeon E5-2600 v1/v2, DDR3, earlier Cisco IMC and storage-controller options | Complete drive caddies, CPUs, memory, rails, and tested power supplies help distinguish reusable systems from parts-only inventory. |
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| C-Series M4 | Approx. 2014–2017 | C220 M4, C240 M4, C460 M4 | Xeon E5-2600 v3/v4, DDR4, refreshed storage and PCIe expansion | List the exact M4 model, storage backplane, RAID controller, CPU generation, and included rails or caddies. |
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| C-Series M5 | Approx. 2017–2021 | C220 M5, C240 M5, C480 M5, C125 M5 | 1st/2nd Gen Xeon Scalable and AMD EPYC options, DDR4, Cisco IMC, broader NVMe and accelerator support | C240 and C480 configurations can vary widely; include risers, GPUs, drive count, storage controller, and power-supply details. |
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| C-Series M6 | Approx. 2021–2023 | C220 M6, C240 M6, C225 M6, C245 M6 | 3rd Gen Xeon Scalable or AMD EPYC platforms, DDR4, PCIe Gen4, and updated Cisco management | Identify Intel versus AMD systems and include PCIe risers, NVMe support, fabric context, and any UCSM or Intersight relationship. |
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| C-Series M7 | Approx. 2023–present | C220 M7, C240 M7; X-Series M7 compute nodes | Newer Xeon Scalable and modular UCS options, DDR5, PCIe Gen5, and current management features | Model-specific configuration matters; provide the service label, CPU and memory inventory, storage, risers, and support status. |
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| C-Series M8 | Approx. 2024–present, model-dependent | C245 M8 and newer model-specific platforms | Current AMD or Intel platform options with newer memory, PCIe, security, and management capabilities | Treat M8 as a model-specific category rather than assuming every C-Series model has an M8 revision. |
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