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Hardware Refresh Cycle Calculator

Work out hardware refresh cycle instantly with clear inputs, formula shown and shareable results.

About Hardware Refresh Cycle Calculator

Refresh economics rest on three factors: how many old servers one new one replaces, the operating cost that consolidation removes, and rising failure rates as hardware ages past its warranty. When a new server does the work of nearly three old ones, the power and support saving alone often pays for it inside three years — before counting the reliability benefit.

Formula

Refresh economics

servers replaced = 1 + performance gain; operating saving = annual per-server cost x gain; payback = purchase cost / saving

Worked example

With the default values below, Hardware Refresh Cycle Calculator returns Recommended refresh interval of 6.0. Change any input above and every figure here is recalculated in your browser.

Inputs used

Cost of a new serverminimum 0
18,000
Performance gain over the old serveraccepts 1–1,000 %
180 %
Annual power, cooling and support per serverminimum 0
2,400
Failure rate increase per year of ageaccepts 0–200 %
25 %

Results

Recommended refresh interval
6.0 years
Old servers one new server replaces
2.8
Annual operating saving from consolidation
$4,320.00
Payback on the purchase
4.2 years

Step by step

  1. 1Values used
  2. 2Refresh economics
  3. 3Recommended refresh interval= 6.0 years
  4. 4Old servers one new server replaces= 2.8
  5. 5Annual operating saving from consolidation= 4,320.00
  6. 6Payback on the purchase= 4.2 years

Assumptions and limits

  • The result is derived only from the 4 inputs listed above. Anything not among them is not part of the calculation.
  • In particular, this calculator does not take inflation or tax into account.
  • Figures are rounded for display to 2 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Frequently Asked Questions

Is a longer refresh cycle cheaper?

Only up to a point. Beyond warranty expiry, failure rates and support costs rise while the performance gap against current hardware widens, so total cost eventually increases.

What else should drive refresh timing?

Security features such as newer firmware protections, memory capacity ceilings that block workload growth, and the end of vendor firmware support.

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