Compare Workstations

Current Generation	HP Z8 G4	HP Z6 G4	HP Z4 G4
Manufacture Year(s)	2018 - current	2018 - current	2018 - current
Form Factor	Rackable tower	Rackable minitower	Rackable minitower
Processor Family	Intel Xeon Processor Scalable Family - up to 28-core	Intel Xeon Processor Scalable Family - up to 28-core	Intel Xeon W Processor Family - up to 18-core Intel Core i7/i9 Processor Family - up to 18-core
Processors	One or Two: Intel Xeon Platinum 82xx or 81xx processors Intel Xeon Gold 62xx or 61xx processors Intel Xeon Gold 52xx processors or 51xx processors Intel Xeon Silver 42xx processors or 41xx processors Intel Xeon Bronze 32xx or 31xx processors	One or Two: Intel Xeon Platinum 82xx or 81xx processors Intel Xeon Gold 62xx or 61xx processors Intel Xeon Gold 52xx processors or 51xx processors Intel Xeon Silver 42xx processors or 41xx processors Intel Xeon Bronze 32xx or 31xx processors	One: Intel Cascade Lake W (CLX-W) and Cascade Lake X (CLX-X) CPUs Intel Xeon W-22xx processors or W-21xx processors Intel Core i9-109xx processors Intel Core i9-99xx processors Intel Core i7-79xx processors Intel Core i7-78xx processors
Chipset	Intel® C622	Intel® C622	Intel® C422
Memory	Type: DDR4 RDIMM ECC Slots: 24 DIMM (12 per processor) Speed: 2666MHz (1st Gen Intel Xeon Scalable), 2933MHz (1st Gen Intel Xeon Scalable) Capacities: 4GB, 8GB, 16GB, 32GB, 64GB, 128GB Maximum: 3 TB (1.5 TB per processor)	Type: DDR4 RDIMM ECC Slots: 6 DIMM onboard (6 DIMM additional with optional 2nd processor riser) Speed: 2666MHz (1st Gen Intel Xeon Scalable), 2933MHz (1st Gen Intel Xeon Scalable) Capacities: 4GB, 8GB, 16GB, 32GB, 64GB, 128GB Maximum: 768 GB	Type: DDR4 ECC RDIMMs - Supported with Xeon W Series CPUs / DDR4 Non-ECC UDIMMs supported with Core X Series CPUs Speed: 2666MHz (1st gen CPUs), 2933MHz (2nd gen CPUs) Slots: 8 DIMM Maximum: 128 GB for Core X Sky Lake Series CPUs. 256 GB for Core X Cascade Lake Series CPUs. 512 GB for Xeon W Sky Lake Series CPUs. 512 GB for Xeon W Cascade Lake Series CPUs
I/O Controller	Integrated SATA 6.0 Gb/s Factory integrated RAID available for SATA/SAS drives (RAID 0, 1, and 10)	Integrated SATA 6.0 Gb/s OEM RAID Solutions available for SATA/SAS drives (RAID 0, 1, and 10)	Integrated SATA 6.0 Gb/s OEM RAID Solutions available for SATA/SAS drives (RAID 0, 1, and 10)
Internal Storage	4x Drive Bays - Up to 4x 3.5" or 2.5" SATA Drives 3x Optical Bays - Up to 4x 3.5" or 2.5" SATA Drives Up to 4x M.2 NVMe PCIe SSDs on 2 'Personality' PCIe x4 Slots. 2 drives per CPU. Up to 8x M.2 NVMe PCIe SSDs on 2 HP Z Turbo Quad Pro x16 cards. 1 card per CPU.	Up to 4x 3.5" (or 2.5") SATA Drives Up to 2x M.2 NVMe PCIe SSDs M.2 on motherboard + Up to 4x drives on a HP Z Turbo Quad Pro x16 card	SATA Drives Up to 4x 3.5" (or 2.5") M.2 NVMe PCIe SSDs Up to 2x drives on motherboard with Xeon W Series CPUs Up to 1x drives on motherboard with Core X Series CPUs + Up to 4x drives on a HP Z Turbo Quad Pro x16 card
External Storage	Integrated: DVD Writer Optional: Blu-Ray Writer	Integrated: DVD Writer Optional: Blu-Ray Writer	Integrated: DVD Writer Optional: Blu-Ray Writer
Available Graphics	NVIDIA GeForce NVIDIA Quadro NVIDIA NVS AMD Radeon Pro	NVIDIA GeForce NVIDIA Quadro NVIDIA NVS AMD Radeon Pro	NVIDIA GeForce NVIDIA Quadro NVIDIA NVS AMD Radeon Pro
Audio	Realtek HD ALC221	Realtek HD ALC221	Realtek HD ALC221
Networking	LAN Integrated: Intel i219 and i210 Gigabit Ethernet controllers with Intel Remote Wake UP, PXE and Jumbo frames support.	LAN Integrated: Intel i219 Gigabit Ethernet controller with Intel Remote Wake UP, PXE and Jumbo frames support.	LAN Integrated: Intel i219 Gigabit Ethernet controller with Intel Remote Wake UP, PXE and Jumbo frames support.
Expansion Slots	2x PCIe x4 3x PCIe x8 4x PCIe x16 Slot 1 PCIe x4: Transforms to PCIe x8 when 2nd CPU is installed Slots 3 and 6 PCIe x16 - Available only when 2nd processor is installed 1 PCIe x8 has rear bulkhead access 2 PCIe x8 are internal access only (For M.2 NVMe Solid-State Drives)	3 PCIe x4 1 PCIe x8 2 PCIe x16 2 M.2 PCIe x4 (Slot 1: CPU with open-ended connector. Slots 3 and 6: PCH with open-ended connector. Slot 4: CPU with open-ended connector (slot converts to x4 electrical when SSD is installed in 2nd M.2 slot). M.2 Slots 1 and 2: CPU up to 80 mm storage devices.)	2x PCIe x16 1x PCIe x8 2x PCIe x4
Ports and Connectors	Standard Front Panel: 1 headset; 4 USB 3.1 (1 charging) Premium Front Panel (optional): 1 headset, 2 USB 3.1 Gen1 Type-A (1 charging), 2 USB 3.1 Gen 2 Type-C, SD Media Card Reader. Rear: 1 PS/2 keyboard port; 1 PS/2 mouse port; 2 RJ-45 (1 GbE); 6 USB 3.1 Gen 1; 1 audio-in; 1 audio-out; 1 serial	Standard Front Panel: 1 headset; 4 USB 3.1 (1 charging) Premium Front Panel (optional): 1 headset, 2 USB 3.1 Gen1 Type-A (1 charging), 2 USB 3.1 Gen 2 Type-C, SD Media Card Reader. Rear: 6 USB 3.1 Gen 1; 2 RJ-45 (1 GbE); 1 audio line out; 1 audio line in; 1 PS/2 mouse port; 1 PS/2 keyboard port; 1 serial port (optional)	Standard Front Panel: 1 headset; 4 USB 3.1 (1 charging) Premium Front Panel (optional): 1 headset, 2 USB 3.1 Gen1 Type-A (1 charging), 2 USB 3.1 Gen 2 Type-C, SD Media Card Reader. Rear: 6 USB 3.1 Gen 1; 2 RJ-45 (1 GbE); 1 audio line out; 1 audio line in; 1 PS/2 mouse port; 1 PS/2 keyboard port; 1 serial port (optional)
Power	1450 W internal power supply, up to 90% efficiency, active PFC 1125 W internal power supply, up to 90% efficiency, active PFC	1000 W internal power supply, up to 90% efficiency, active PFC 700 W internal power supply, up to 90% efficiency, active PFC	1000 W internal power supply, up to 90% efficiency, active PFC 750 W internal power supply, up to 90% efficiency, active PFC 465 W internal power supply, up to 90% efficiency, active PFC
Dimensions (W x D x H)	8.5 x 21.7 x 17.5 in 21.59 x 55.12 x 44.45 cm	6.65 x 18.3 x 17.5 in 16.9 x 46.5 x 44.5 cm	15.2 x 6.65 x 17.5 in 38.6 x 16.9 x 44.5 cm
Weight	49.4 lb / 22.4 kg (Exact weight depends upon configuration.)	29 lb / 13.1 kg (Exact weight depends upon configuration.)	24.9 lb / 11.3 kg (Exact weight depends upon configuration.)