Rack-mountable servers pack the most compute density into a standard data-center rack. Our rack server lineup spans 1U rack servers for high-density compute and 2U systems for storage- and GPU-heavy workloads, including Dell PowerEdge R-series, HPE ProLiant DL, and Lenovo ThinkSystem SR. Looking to buy a rack server on a budget? Certified-refurbished units deliver enterprise reliability at a fraction of new pricing — every one is tested and warrantied for 3 years. Tell us your rack space, power budget, and workload and we'll spec the right 1U or 2U configuration, with same-day shipping on in-stock systems.
Browse 423 products in Rack Servers.
1U servers like the Dell PowerEdge R650 or HPE ProLiant DL360 pack two processors into minimal rack space and suit web, application, and virtualization tiers. 2U platforms — the PowerEdge R750 and ProLiant DL380 families — add drive bays and PCIe slots, making them the default choice for storage-heavy workloads, GPU acceleration, and general-purpose consolidation. 4U chassis serve specialized GPU-dense or high-capacity storage roles.
All rack servers we ship include rail kits on request and can be configured with your choice of processors, memory, drives, and network adapters. Mixed-generation fleet? We stock previous-generation systems so replacement nodes match your existing cluster exactly.
Rail kits are available for every system we sell — tell us at order time and we will include the correct OEM or compatible rails for your rack.
A 1U server occupies one rack unit (1.75") and prioritizes density; a 2U server doubles the height to fit more drive bays, PCIe expansion, and better cooling headroom for GPUs and high-TDP processors.
Yes. We deliberately stock previous and end-of-sale generations (e.g. PowerEdge R740, ProLiant DL380 Gen10) so you can add matching nodes without a forklift upgrade.