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Business computersENERGY STAR certified

HP Z4 Rack G5 Workstation ENERGY STAR

256 GB workstation computer, model number Z4 Rack G5 Workstation.

Memory

256 GB

Processor

Xeon W7-2495X

Typical electricity use

64.6 kWh/yr

CPU cores

24

Of 60 certified workstation business computers, 33 have a lower typical electricity use than the HP Z4 Rack G5 Workstation ENERGY STAR (64.6 kWh/yr).

Its certified typical electricity use of 64.6 kWh/yr costs about $8.40 a year at 13¢/kWh.

Maker
HP
Model
HP Z4 Rack G5 Workstation ENERGY STAR
Model number
Z4 Rack G5 Workstation
Type
Workstation
Processor
Xeon W7-2495X
CPU cores
24
Memory
256 GB
Storage
Solid State Drive, Hard Disk Drive
Operating system
Windows 11
Marketed as a workstation
Yes
Typical electricity use
64.6 kWh/yr
Power in sleep
8.3 W
Power at long idle
109 W
Power when off
2.8 W
On the market since
Aug 2023
ENERGY STAR certified
3 Jul 2025

Source: ENERGY STAR certified business computers dataset, US EPA, record 4465046, data build 2026-09-29. Figures are as the maker certified them. How we use this data.

Other makers

Machines comparable to the HP Z4 Rack G5 Workstation ENERGY STAR

Certified business computers from other makers, same color class, within 20% of its speed.

ModelTypeProcessorMemoryTypical electricity use
ASUS Pro ET700I W7WorkstationXeon256 GB82.3 kWh/yr
Supermicro AS -531AW-TCWorkstationRyzen Threadripper PRO 7965WX256 GB233 kWh/yr
Lenovo ThinkStation P4WorkstationRyzen 9 PRO 9965X3D 16-Core Processor256 GB38.3 kWh/yr
ASUS Pro ER100A B6WorkstationEPYC 4584PX192 GB40.8 kWh/yr
Supermicro SYS-532AW-CWorkstationIntel®Core™ Ultra 7192 GB158 kWh/yr
Lenovo ThinkStation P3 Tower Gen 2WorkstationUltra 9 285K192 GB33.4 kWh/yr

HP

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HP Fortis G2m 11 inch Chromebook ENERGY STARNotebookMediaTek Kompanio 5408 GB6.5 kWh/yr
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HP ProBook 4 G2iS 14 ENERGY STARNotebookCore 7 35032 GB9.2 kWh/yr
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