| Accelerator and node | Exact GPU, SXM/PCIe or rack-scale system, GPUs per node, CPU, memory, local NVMe | “H100” or “B200” alone does not establish memory, topology, or expected scaling behavior. |
| Scale-up fabric | NVLink/NVSwitch domain and boundaries | Controls communication inside the node or rack-scale domain. |
| Scale-out fabric | InfiniBand or Ethernet generation, link speed, topology, blocking ratio, RDMA configuration | Distributed training can be bottlenecked by the fabric long before GPUs saturate. |
| Storage | Usable capacity, read/write throughput, metadata performance, checkpoint path, egress | Data loading and checkpointing can erase theoretical GPU gains. |
| Availability | Live, allocated, under installation, financed, or forecast; start date and dependencies | A future pipeline is not the same risk as a running cluster. |
| Commercials | Rate basis, term, deposit, prepay, minimums, taxes, bandwidth, storage, support, renewal | Headline GPU-hour rates are not comparable without the surrounding obligations. |
| Acceptance and SLA | Test plan, service boundary, uptime, performance, maintenance, credits, replacement, termination rights | The contract needs a measurable line between delivery, acceptance, and remediation. |
| Counterparty | Owner, host, operator, reseller, contracting entity, support owner | The buyer needs to know who controls delivery and who carries each obligation. |