[
    {
        "role": "user",
        "content": "what%20is%20highest%20end%20nvidia%20card%20supported%20in%20lenovo%20st550%3F"
    },
    {
        "role": "assistant",
        "content": "Here\u2019s what I found out about the **highest-end NVIDIA GPU** that Lenovo ThinkSystem **ST550** officially supports, along with relevant limitations. If you tell me whether yours has the *original chassis* or the *new chassis*, I can help you narrow it further.\n\n---\n\n## What Lenovo Says\n\nFrom official Lenovo documentation, the ST550 supports several classes of NVIDIA GPUs, with the most capable being:\n\n- **NVIDIA P6000** \u2014 full-height, full-length, **double-slot** GPU ([pubs.lenovo.com](https://pubs.lenovo.com/st550/server_specifications?utm_source=openai))  \n- **NVIDIA P4000** and **RTX4000** \u2014 full-height, full-length, **single-slot** GPUs (but *only in the new chassis*) ([pubs.lenovo.com](https://pubs.lenovo.com/st550/server_specifications?utm_source=openai))  \n\nThe documents also note that the ST550 can support up to **two graphics adapters** simultaneously, although there are thermal, power, and cooling prerequisites. ([pubs.lenovo.com](https://pubs.lenovo.com/st550/server_specifications?utm_source=openai))\n\n---\n\n## Key Requirements & Constraints\n\nTo support those maximum GPUs (especially the P6000), your system must meet certain conditions:\n\n1. **Power Supply (PSU):**  \n   You must have **two 1100-watt AC power supplies** installed. These are high-capacity units to support the GPU\u2019s power draw. ([pubs.lenovo.com](https://pubs.lenovo.com/st550/server_specifications?utm_source=openai))\n\n2. **Chassis Type:**  \n   - **Original chassis** (older design) does **not** support the P4000 or RTX4000 in full-height, full-length single-slot form. ([pubs.lenovo.com](https://pubs.lenovo.com/st550/zh-CN/server_specifications?utm_source=openai))  \n   - **New chassis** (lenovo part numbers SC87A19892 or SC87A19894) supports those newer Form Factor V3.0 GPUs like P4000 & RTX4000. ([pubs.lenovo.com](https://pubs.lenovo.com/st550/zh-CN/server_specifications?utm_source=openai))\n\n3. **Cooling / Fans:**  \n   - Fan 4 (the rear redundant fan) must be installed.  \n   - Operating temperature caps: below **35 \u00b0C (95 \u00b0F)** when one P6000 is installed; below **30 \u00b0C (86 \u00b0F)** if two are installed. For other supported GPUs, 35 \u00b0C is the limit with one or two cards. ([pubs.lenovo.com](https://pubs.lenovo.com/st550/server_specifications?utm_source=openai))\n\n4. **PCI-Express Slot Availability:**  \n   - Slot 3 (and slot 5 if a second CPU is installed) are the ones that support *double-wide* GPUs. ([lenovopress.lenovo.com](https://lenovopress.lenovo.com/lp1055-thinksystem-st550-server-xeon-sp-gen-2?utm_source=openai))  \n   - Installing a double-wide GPU in these slots makes adjacent slots unavailable due to physical space. ([lenovopress.lenovo.com](https://lenovopress.lenovo.com/lp1055-thinksystem-st550-server-xeon-sp-gen-2?utm_source=openai))  \n\n5. **TDP Limit:**  \n   All officially supported GPUs must be within **250 watts** TDP. ([pubs.lenovo.com](https://pubs.lenovo.com/st550/server_specifications?utm_source=openai))  \n\n---\n\n## What This Means for \u201cHighest-End\u201d GPU\n\nGiven all constraints:\n\n- The **NVIDIA P6000** is the top officially supported card, being double-slot and full-height/length. If your ST550 meets the PSU, cooling, and temperature requirements, that\u2019s the peak. ([pubs.lenovo.com](https://pubs.lenovo.com/st550/server_specifications?utm_source=openai))  \n- If you have the **new chassis**, the P4000 or RTX4000 are also options (still very high performance) with somewhat less power/thermal demand than the P6000. ([pubs.lenovo.com](https://pubs.lenovo.com/st550/zh-CN/server_specifications?utm_source=openai))  \n\n---\n\n## Caveats & What Is *Not* Supported\n\n- Modern GeForce RTX 30/40-series, or newer architecture NVIDIA GPUs (e.g. Ampere, Ada Lovelace) are *not listed* among supported GPUs in Lenovo\u2019s compatibility docs. Unless you verify they fit all those constraints (form factor, power, cooling), using them would be at your own risk (and possibly void support).  \n- Additionally, just because a card physically fits doesn't mean it\u2019s \"officially supported\" in terms of firmware, drivers, or server testing.\n\n---\n\nIf you tell me whether **your ST550 has one or two CPUs** and whether it\u2019s the **original or new chassis**, I can help you determine exactly what your best option is (and possibly if you could squeeze in a more powerful card than officially supported)."
    }
]