Rack servers are 1U–4U chassis-mount compute platforms designed to slot into standard 19-inch equipment racks, and this category covers single-socket and dual-socket general-purpose servers, high-density storage servers, and GPU-optimized nodes from manufacturers including Dell, HPE, Lenovo, Supermicro, and ASRock Rack. Key buying considerations include socket generation and TDP (Intel Xeon Scalable vs. AMD EPYC), maximum RAM capacity and DIMM slot count, PCIe slot availability for GPU or NIC expansion, drive bay configuration (NVMe U.2/U.3 vs. SAS/SATA), integrated BMC/iDRAC/iLO for out-of-band management, and power supply redundancy and efficiency rating (80 PLUS Titanium/Platinum).

Rack servers are deployed across enterprise data centers, colocation facilities, edge compute rooms, HPC clusters, and AI training or inference environments. Organizations running virtualization workloads (VMware, Proxmox), containerized microservices, large database instances, or multi-GPU inferencing will find configurations here ranging from cost-efficient single-socket 1U platforms to dense 4U nodes capable of hosting eight full-length double-wide GPUs.