Choose a colocation power allocation using the server’s measured input demand and the provider’s agreed limit. The wattage printed on a power supply describes its capacity, not the machine’s constant consumption. Idle draw alone is also insufficient for planning.
Keep the units distinct
For a single-phase load, volts multiplied by amps gives apparent power in volt-amperes. Real power in watts also depends on power factor. For example, 208 V at 1 A corresponds to 208 VA; it is not automatically a promise that every 208 W load is acceptable under a service agreement.
| Item | Why it matters |
|---|---|
| Input voltage range | The server must support the supplied power |
| Measured idle and busy demand | Workload changes can alter consumption |
| Startup and recovery behavior | Booting or rebuilding can differ from normal load |
| Power-supply and feed arrangement | Redundancy depends on the complete power path |
| Agreed operating limit | The service allowance governs deployment |
Build a representative power profile
- Use supported management telemetry or approved measurement equipment.
- Record idle demand and a representative busy workload.
- Include the drives, memory, accelerators and fans in the final configuration.
- Discuss peak behavior and the required operating margin with the provider.
- Confirm connectors, feed arrangements and any upgrade charges before shipping.
Two power supplies do not necessarily mean two independent feeds, and normal load sharing does not establish the draw after one supply or feed fails. Have the provider confirm the intended arrangement. Do not modify electrical equipment or bypass rated limits to make a configuration fit.
Recheck after hardware changes
Adding drives or an accelerator can invalidate the original estimate. Keep a power baseline with your equipment inventory and review it before an upgrade. If the configuration exceeds the agreed allocation, arrange a suitable service rather than relying on the fact that the server currently boots.
Use this with the shipping checklist and compare the location-specific options on the colocation page.
Sources and references
Hosting documentation. Publication and update dates reflect this edition.
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