Make in India · Burn-in tested · Hypervisor-ready
4U rack servers — capacity, cooling and expansion
For HCI nodes, large storage clusters and GPU-dense compute. Maximum drive bays, airflow and PCIe headroom for RTX-class accelerators.
- Up to 36 bays — Hot-swap
- RTX GPU-ready — Up to 8 accelerators
- Dual / quad CPU — Xeon or EPYC
- Validated hypervisors — Including vSAN
- 24–72h burn-in — Before dispatch
About the form factor
The most expandable of the standard form factors
4U rack servers are the pinnacle of expandability and cooling among standard form factors. They provide space for maximum drive counts, extensive PCIe slots and multiple double-width GPUs, which makes them versatile across large storage clusters, HCI platforms and GPU-intensive compute nodes.
Typical 4U builds combine dual or quad-socket Intel Xeon or AMD EPYC CPUs, large memory footprints of 1 to 2TB and beyond, and flexible NVMe and HDD tiers. They are validated across the leading hypervisors and cloud stacks, so they deploy into production without a compatibility exercise first.
As with every NetBytes platform, 4U servers are burn-in tested, labelled and shipped rack-ready, with nationwide delivery, on-site assistance in the major cities and remote support elsewhere.
Three product lines
What a 4U chassis gets configured into
The same footprint serves three quite different jobs, and the build diverges early depending on which one it is.
- Storage-dense servers — 24 to 36 hot-swap bays, for Ceph clusters, SDS deployments and backup or archival nodes.
- GPU compute servers — RTX and data-centre GPU-ready platforms supporting up to 8 accelerators, with tuned airflow and power design.
- Hyperconverged nodes — Balanced compute and storage builds validated for Nutanix, VMware vSAN and Proxmox clusters.
Example configurations
Three starting points, not a catalogue
Illustrative builds showing where each 4U line usually starts. Every system is configured to the workload.
- 4U storage-dense — Configuration: Dual Xeon · 1TB · 24–36 bays · Ceph-ready. Notes: Validated for SDS and HCI, hot-swap bays, redundant PSUs
- 4U GPU compute — Configuration: AMD EPYC · 2TB · up to 8 GPUs · RTX and NVLink-ready. Notes: Thermals optimised for accelerators, multiple PCIe Gen4/Gen5 slots, high-efficiency redundant PSUs
- 4U hyperconverged node — Configuration: Dual Xeon · 1TB · NVMe + HDD hybrid · 25/100G. Notes: Validated for Nutanix, VMware vSAN and Proxmox clusters, 24–72h burn-in
Illustrative only. Pricing is on request and depends on the configuration actually specified.
What the extra rack units buy
Density, airflow and PCIe headroom
A 4U draws more power and moves more air than a 2U or 3U, and in return gives density nothing else in a standard rack can match. Acoustic and power profiles are optimised for data centre placement rather than for an office.
That trade is worth making when the alternative is three chassis doing the work of one — or when eight double-width accelerators have to be fed and cooled in a single node.
- Maximum drive counts for scale-out storage and archival nodes
- Extensive PCIe for accelerators, HBAs and high-speed fabric
- Airflow volume sized for sustained accelerator load
- High-efficiency redundant power, sized for a fully-populated chassis
- 25G and 100G networking for HCI and cluster interconnect
- double-width GPUs
- memory footprints
- PCIe slots
- and Nutanix validated
4U servers — FAQ
What buyers ask before specifying
- What are typical use cases? — Answer: Scale-out storage with Ceph or SDS, HCI nodes, and GPU-dense compute with RTX or NVIDIA data-centre accelerators.
- How many GPUs can a 4U support? — Answer: Depending on the chassis, up to 8 double-width GPUs, with tuned airflow and redundant power.
- Are 4U servers noisy or power-hungry? — Answer: They draw more power and airflow than 2U or 3U, and give more drive and card capacity in return. Acoustic and power profiles are optimised for data centre use.
- Are these validated for hypervisors? — Answer: Yes. All 4U systems are validated for Proxmox VE, VMware ESXi, XCP-ng, Hyper-V and Nutanix AHV or vSAN.
At a glance
The 4U envelope
- hot-swap drive bays
- socket platforms
- with tuned airflow
- labelled and tested on arrival
Size it first
Work the numbers before you specify
The calculators run the same arithmetic our engineers do, so you can arrive with a starting configuration rather than a blank page.
- VM density & host sizing — Host count, memory and overcommit worked through before you specify a node.
- RAID capacity planner — Usable capacity, redundancy overhead and rebuild exposure across RAID levels.
- All sizing tools — Six calculators running the same arithmetic our engineers do.
Related range
The rest of the rack range
Where less chassis is the better answer.
- 2U rack servers — Balanced airflow and expansion for virtualisation, databases and application servers.
- 3U rack servers — Storage density and GPU thermals without moving to a 4U footprint.
- Dual controller storage — Active-active controllers where clinical or transactional access cannot pause.