L40s

Overview

L40S appears here as a datacenter GPU used in dense multi-GPU servers and workstations, commonly in 4x, 6x, and 8x configurations. The tickets center on GPU hardware faults, ECC and PCIe-drop issues, no-boot or platform-level failures in L40S systems, driver or display-stack questions, and several cases where the real culprit turned out to be firmware, power cabling, or another system component rather than the GPU itself ([14353], [19778], [25610], [35728], [42123]) ...and 21 more.

Known Issues

• gpu-hardware-failure, 14 tickets. Recurrent L40S problems include uncorrectable ECC errors, GPUs falling off the bus, cards failing to enumerate, and workload crashes that follow a specific GPU card ([14353], [24457], [25610], [32778], [35753]) ...and 9 more.
• system-boot-failure, 4 tickets. Some L40S systems failed to power on, would not boot any OS, or behaved like DOA platform failures rather than isolated GPU issues ([25910], [26239], [26284], [26464]).
• software-installation, 4 tickets. Customers asked about L40S compatibility for workloads, driver failures, Rocky / Ubuntu behavior, and display-stack use with DP / Xorg / GDM3 ([18725], [25973], [32453], [35137]).
• no-trouble-found-rma, 4 tickets. Several returned L40S cards passed Exxact bench tests even though the customer saw repeated ECC or bus-drop failures in production ([25744], [32778], [32983], [41278]).
• incorrect-hardware-shipped, 2 tickets. At least one urgent L40S replacement also required correcting the accessory kit, GPU shroud brackets, and power-cable bundle sent with the GPU ([26889], [35137]).

Common Questions

• How do I prove the L40S itself is bad? The strongest evidence is that the fault follows the card when moved between slots or systems. Exxact repeatedly asked for slot swaps, bus mapping, nvidia-smi, lspci, journalctl, ipmitool, or stress-test evidence before approving component RMA ([14353], [14587], [25610], [35728], [35753]).
• What are the common failure signatures? The main ones are uncorrectable ECC errors, GPU has fallen off the bus, missing enumeration in nvidia-smi or lspci, and workload failures under burn or production load ([14353], [25610], [32778], [35753], [42123]).
• Can the problem be something other than the GPU? Yes. Ticket evidence shows L40S symptoms can also come from PCIe slot / Gen-speed issues, bad power cables, unsupported or outdated drivers, or broader motherboard / platform faults ([14726], [19778], [25744], [25973], [26889]).
• Why might Exxact return the same GPU instead of replacing it? Multiple L40S RMAs tested NTF or could not reproduce the reported failure in-house, so the original card was returned for another field trial rather than replaced outright ([25744], [32778], [41278]).
• Are platform firmware and BIOS important on L40S systems? Yes. One major slot-failure case resolved after BIOS update plus GPU reseating, and other cases hinged on driver-version support or system-level validation rather than confirmed GPU defects ([14726], [19778], [25973], [34377]).
• Can accessories matter as much as the GPU? Yes. One L40S replacement also needed correct 12v GPU cables, shroud brackets, and the right accessory box, and another ticket ultimately found the disappearing-GPU symptom was actually due to a failed power cable rather than the card itself ([26889], [35137]).
• Can L40S be used for display output? At least one ticket specifically concerned DP output with Xorg and GDM3, so some customers do use the card in display-attached workflows, not only headless compute ([32453], [35137]).

Related Products

• H200, a nearby high-end accelerator family in Exxact’s catalog. H200 tickets show similar themes around firmware, multi-GPU server integration, and component RMA, but L40S appears more often in PCIe workstation / server contexts and display-attached workflows.
• L40S server platforms such as TS4-169350989 and GIGABYTE G482-Z54, common confusion points where customers may attribute a fault to the GPU even when the actual problem is system power-on, BIOS, PCIe link state, or motherboard behavior ([19778], [25910], [26284], [35728]).
• Accessory kits, shroud brackets, and GPU power cables, which repeatedly appear as required companions to L40S replacement or expansion workflows ([26889], [35137]).
• Rocky Linux and Ubuntu driver stacks, since several L40S tickets were really about OS / driver behavior, enumeration, or display-stack compatibility rather than confirmed hardware failure ([18725], [25973], [32453], [35728]).

Referenced by

• No Trouble Found RMA — issue affecting this product (×5)
• Firmware Driver Compatibility — issue affecting this product (×1)
• GPU Hardware Failure — issue affecting this product (×12)
• RMA Workflow — issue affecting this product (×20)
• System Boot Failure — issue affecting this product (×3)
• PCIE Riser Failure — issue affecting this product (×1)
• Software Installation — issue affecting this product (×2)
• Incorrect Hardware Shipped — issue affecting this product (×1)
• OS Boot Failure — issue affecting this product (×1)