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.
| Model | Type | Processor | Memory | Typical electricity use |
|---|---|---|---|---|
| ASUS Pro ET700I W7 | Workstation | Xeon | 256 GB | 82.3 kWh/yr |
| Supermicro AS -531AW-TC | Workstation | Ryzen Threadripper PRO 7965WX | 256 GB | 233 kWh/yr |
| Lenovo ThinkStation P4 | Workstation | Ryzen 9 PRO 9965X3D 16-Core Processor | 256 GB | 38.3 kWh/yr |
| ASUS Pro ER100A B6 | Workstation | EPYC 4584PX | 192 GB | 40.8 kWh/yr |
| Supermicro SYS-532AW-C | Workstation | Intel®Core™ Ultra 7 | 192 GB | 158 kWh/yr |
| Lenovo ThinkStation P3 Tower Gen 2 | Workstation | Ultra 9 285K | 192 GB | 33.4 kWh/yr |
HP
More HP business computers
| Model | Type | Processor | Memory | Typical electricity use |
|---|---|---|---|---|
| HP OmniBook 5 14 inch Laptop AI PC ENERGY STAR | Notebook | Intel Core 7 350 | 16 GB | 9.2 kWh/yr |
| HP Fortis G2m 14 inch Chromebook ENERGY STAR | Notebook | MediaTek Kompanio 540 | 16 GB | 7.6 kWh/yr |
| HP Fortis G2m 11 inch Chromebook ENERGY STAR | Notebook | MediaTek Kompanio 540 | 8 GB | 6.5 kWh/yr |
| Fortis Flip G2m 11 inch | Notebook | MediaTek Kompanio 540 | 16 GB | 6.3 kWh/yr |
| HP ProBook 4 G2iS 14 ENERGY STAR | Notebook | Core 7 350 | 32 GB | 9.2 kWh/yr |
| HSN-I70C | Notebook | Ryzen AI Max+ PRO 495 | 192 GB | 21.7 kWh/yr |
| HP Elite t655 Thin Client | Desktop | R2314 | 8 GB | 26 kWh/yr |
| 14c-cf | Notebook | Snapdragon X1E80100 | 32 GB | 19.9 kWh/yr |