Turnkey 256GB Unified Memory Local AI Supercomputer Cluster
2x MSI EdgeXpert MS-C931 (4TB PCIe Gen5 NVMe / 128GB LPDDR5x Each) + NVIDIA ConnectX-7 QSFP112 400G DAC Interlink Cable

Up for sale is a lightly used, turnkey 2-node cluster of MSI EdgeXpert MS-C931 AI Mini Desktop supercomputers in the top-tier 4TB PCIe Gen5 NVMe SSD / 128GB Unified Memory configuration (matching MSI's dual-unit EdgeXpert-02SKUS bundle that currently retails for $16,079.00 on the official MSI US Store). Built on the NVIDIA DGX Spark (GB10 Grace Blackwell) platform, this bundle includes the high-speed NVIDIA ConnectX-7 QSFP112 passive copper interlink cable required to link both machines into a single 256GB unified-memory cluster.

Verified Purchase History, Condition & Reason for Selling

Both units were purchased brand-new from Amazon by our business for local AI development and benchmarking:

• Unit #1 Purchased: July 7, 2026 (~3 months old; MSI 1-year factory warranty valid through July 7, 2027)
• Unit #2 Purchased: August 10, 2026 (only ~2 months old; MSI 1-year factory warranty valid through August 10, 2027)

Both machines have performed exceptionally well in a clean, climate-controlled, smoke-free office with zero issues. The only reason we are selling this cluster is that our local AI workloads proved out so well on these units that we are scaling up and upgrading to even larger server hardware.

Why This 2-Node 4TB Gen5 + Cable Bundle Stands Out

• Full 128GB Unified Memory Per Node (256GB Combined): Unlike the newer cut-down 64GB variants, each of these systems features the full 128GB LPDDR5x coherent unified system memory (256GB combined across both nodes). A single node runs models up to 200B parameters, and linking both nodes via the included ConnectX-7 cable pools memory to run and fine-tune massive models up to 405B parameters locally with zero cloud API fees.
• Upgraded 4TB PCIe Gen5 Self-Encrypting NVMe SSD in Both Units (8TB Combined): Each machine is factory-equipped with the 4TB PCIe Gen5 NVMe M.2 SSD with hardware self-encryption (not the base 1TB or Gen4 drive), giving you 8TB of ultra-fast local storage for multiple large model checkpoints, datasets, and containers.
• Includes the Hard-to-Source ConnectX-7 QSFP112 400G DAC Cluster Cable: Includes the direct-attach copper interlink cable connecting the onboard dual-port 200GbE NVIDIA ConnectX-7 Smart NICs between both units for low-latency RoCEv2 / NCCL multi-node communication right out of the box.
• MSI Vapor-Chamber Thermal Engineering: The MSI EdgeXpert MS-C931 improves on reference thermal designs with a dedicated SSD vapor chamber, patented FanDock airflow system, and elevated stacking footpads—sustaining 200W+ continuous inference loads up to 15°C cooler without thermal throttling.

What Is Included in This Listing

• 2x MSI EdgeXpert MS-C931 AI Mini Desktop Supercomputers — Black (128GB LPDDR5x Unified Memory / 4TB PCIe Gen5 Self-Encrypting NVMe M.2 SSD each)
• 1x QSFP112 400G Direct-Attach Copper (DAC) Interlink Cluster Cable (for 200GbE ConnectX-7 node stacking)
• 2x Original MSI 240W USB-C Power Adapters & AC Power Cords

Technical Specifications (Per Unit) Model / SKU Equivalent MSI EdgeXpert AI Mini Desktop MS-C931 (EdgeXpert-13SUS single / EdgeXpert-02SKUS dual bundle) Architecture & SoC NVIDIA DGX Spark Platform / NVIDIA GB10 Grace Blackwell Superchip CPU 20-Core Arm Processor (10x Cortex-X925 + 10x Cortex-A725) GPU & AI Performance NVIDIA Blackwell GPU with 5th-Gen Tensor Cores — 1,000 AI TOPS / 1 PetaFLOP Sparse FP4 per unit (2 PetaFLOPs combined) CPU-GPU Interconnect NVIDIA NVLink-C2C (coherent memory model with 5x PCIe Gen 5 bandwidth) System Memory 128GB Coherent Unified LPDDR5x per unit (256GB combined), 256-bit bus, 273 GB/s bandwidth per node Internal Storage 4TB PCIe Gen5 NVMe M.2 SSD with Self-Encryption per unit (8TB combined) Cluster & Network I/O Dual-Port NVIDIA ConnectX-7 Smart NIC (2x QSFP112 200GbE RoCE cages), 1x 10GbE RJ-45 LAN, Wi-Fi 7 (802.11be), Bluetooth 5.3 Display & USB Ports 1x HDMI 2.1a, 4x USB 3.2 Type-C (supporting DisplayPort Alt Mode for up to 4 independent displays) Power Supply External 240W USB-C PD Power Adapter (runs on standard 120V outlet) Operating System Pre-installed NVIDIA DGX OS (Ubuntu Linux Arm64 with NVIDIA AI Stack, CUDA, Docker, PyTorch, Jupyter, vLLM, SGLang, Ollama) Dimensions & Weight 151 x 151 x 52 mm (5.95" x 5.95" x 2.05" / 1.19L), 2.65 lbs (1.2 kg) per unit — Color: Black Testing, Verification & Insured Shipping Policy

• Both units have been freshly reset to factory NVIDIA DGX OS defaults and verified for full 128GB unified memory recognition, 4TB Gen5 NVMe drive health, and 200GbE (200000 Mb/s) ConnectX-7 QSFP112 link negotiation.
• All serial numbers, MAC addresses, and working boot/cluster verification videos are documented prior to packing to protect both buyer and seller. Redacted copies of the original Amazon order confirmations (July 7, 2026 & August 10, 2026) can be provided to the buyer for MSI warranty reference.
• Professional Double-Boxed Shipping: Ships within 2 business days of cleared payment, professionally packed in anti-static protection and high-density cushioning inside a heavy-duty double-boxed parcel via UPS or FedEx with Full Declared-Value Insurance and Direct Adult Signature Required upon delivery.
• Buyer Requirements: Ships only to the verified /payment address on file (no third-party freight forwarders or post-purchase address changes). Orders from brand-new accounts with zero response may be canceled at seller's discretion—if you have a new account, please message before purchasing.