HP ZCentral 4R Workstation

HP's first-generation 1U rack workstation, built around a single-socket Xeon W-2200 (LGA2066, Intel C422) platform. Marketed as "the world's most powerful 1U racked workstation" for centralized/remote media, engineering and data-science workloads; 4× the density of an equivalent Z4 tower. Superseded by the Z4 Rack G5.

Memory

Slots: 4 DDR4 DIMM slots
Type: DDR4 ECC registered (RDIMM), 2933 MT/s
Max: 256 GB (4 × 64 GB); factory memory kits from 8 GB to 256 GB

Storage

Bays: 2 external 2.5" bays + 1 external 3.5" bay (3.5" bay: 1 × 3.5" drive or 2 × 2.5" drives)
SATA HDD: 1, 2 or 4 TB 7200 rpm 3.5" enterprise HDD
SATA SSD: 256 GB-1.92 TB HP SATA SSD (client and enterprise-grade); 512 GB SED OPAL2
PCIe SSD (M.2): HP Z Turbo Drive Dual Pro 512 GB-2 TB TLC; HP Z Turbo 256 GB-4 TB 4R Kit SSD, SED versions available
Onboard M.2: 2 × PCIe Gen3 x4 (Socket 3, Key M, 2280-D5-M / 22110-D5-M)
Interfaces: 4-channel SATA (6 @ 6.0 Gb/s); USB 2.0, USB 3.1 Gen1, optional USB 3.1 Gen2
RAID: SATA RAID 0/1/10; Intel VROC NVMe Standard controller module (RAID 0/1/10)
Internal I/O: 1 USB 2.0 dual-port header

Graphics

Integrated: None
Entry: NVIDIA T400 2 GB, T400 4 GB (dual not supported)
Mid-range: NVIDIA T1000 4 GB, T1000 8 GB (dual with dual-slot riser), RTX A2000 6 GB, RTX A2000 12 GB (dual with dual-slot riser)
High-end: NVIDIA RTX A4000 16 GB, RTX A4000E 16 GB, RTX A4500 20 GB (dual with dual-slot riser)
Ultra high-end: NVIDIA RTX A5000 24 GB (dual with dual-slot riser), RTX A6000 48 GB (single card requires dual-slot riser and High-End 1350 W chassis)
Adapters: HP miniDP-to-DP adapter

Expansion

Slot 1 (SSR): PCIe 3.0 x16 from CPU, via single-slot riser (single 6+2 pin aux power cable)
Slot 2 (DSR): PCIe 3.0 x16 from CPU (x8 if Slot 3 loaded), via optional dual-slot riser
Slot 3 (DSR): PCIe 3.0 x16 mechanical (x8 electrical) from CPU, via optional dual-slot riser
M.2 Slot 1: PCIe 3.0 x4 from CPU
M.2 Slot 2: PCIe 3.0 x4 from CPU
Notes: Dual-slot riser is optional but required for double-wide graphics cards or more than one PCIe card; adds a dual 6+2 pin aux power cable

Networking

Onboard: 1 × 1/2.5/5/10GbE RJ-45 plus 1 × 1GbE RJ-45 (Intel AMT)

Power

Entry: 1 × 675 W PSU
Entry Redundant: 2 × 675 W PSUs in redundant mode, 675 W usable
High-End: 2 × 675 W PSUs in aggregate mode, 1350 W total

Ports

Front (Base): Power button with power/fault LED, drive activity LED, headset audio, 4 × USB 3.1 Gen1 Type-A (1 charging, 1.5 A @5 V)
Front (Premium, optional): Power button, drive activity LED, headset audio, 2 × USB 3.1 Gen1 Type-A, 2 × USB 3.1 Gen2 Type-C
Rear: 4 × USB 3.1 Gen1 Type-A (0.9 A @5 V each), 1 × 1/2.5/5/10GbE RJ-45, 1 × 1GbE RJ-45 (Intel AMT)
Internal: 1 USB 2.0 dual-port header

Physical

Form factor: 1U rackable workstation
Dimensions, base footprint (H×W×D): 42.8 × 438.15 × 625 mm
Dimensions, with bezel and rack brackets (H×W×D): 42.8 × 486.81 × 645.70 mm
Weight: Minimum 10.7 kg, standard 11.7 kg, maximum 13.6 kg (system only)
Operating temp: 5-35 °C

Operating systems

Preinstalled: Windows 11 Pro for Workstations, Windows 10 Pro for Workstations, Ubuntu Linux 20.04, HP Linux-ready
Supported: Red Hat Enterprise Linux Desktop 7.4 / 8.0 (paper license), Ubuntu 18.04 / 20.04 LTS
Not supported: Windows 7, Windows 8

Processors

Intel Xeon W-2295
Intel Xeon W-2275
Intel Xeon W-2265
Intel Xeon W-2255
Intel Xeon W-2245
Intel Xeon W-2235
Intel Xeon W-2225
Intel Xeon W-2223