Then versus Power11 now

What Did Power5 Really Cost in Today's Dollars?

Put an old Power5 purchase into August 2026 dollars, compare it with a current Power11 quote, and see what the last twenty years should teach the next buying decision.

Bring the old purchase into today's dollars

See what the old Power5 purchase means in today's money and whether the current Power11 quote is truly far apart. Add measured electrical draw to compare annual power cost without confusing it with processing capacity.

Use the best complete hardware purchase number you can document.
Include the same scope when possible.
Use a measured average, not the largest number on a label.
Use a quote estimate or measured value at comparable work.
Use this result as: a purchasing-power and electricity comparison. It is not an IBM price index, performance benchmark, total-cost study, or final configuration review.

The old machine was expensive because the job mattered

Power5 was not bought as a museum piece. It ran payroll, orders, inventory, manufacturing, finance, health records, reservations, and the overnight work that opened the business the next morning. Some of those systems stayed because they were reliable. Some stayed because every replacement project looked harder than one more year of maintenance.

That is what makes the comparison useful now. A purchase that looked huge in 2004 needs to be translated into today's dollars before anyone says current hardware is automatically more expensive. Then the new quote needs the costs that the old invoice did not settle: migration, software tiers, storage, recovery, support, electrical use, and the cost of another delay.

Consumer Price Index factors used by the calculator

Each annual CPI-U average is compared with the August 2026 CPI-U value of 334.980.

Power5 purchase yearCPI-U annual averageAugust 2026 factor
2004188.91.773319
2005195.31.715207
2006201.61.661607
2007207.3421.615592

BLS CPI-U is a broad consumer purchasing-power measure. Enterprise server prices do not move in lockstep with it.

Five Power5 lessons that still matter for Power11

1. Buy the work, not the badge

Power5 model names covered very different machines. Power11 does too. Size from measured work, memory, I/O, growth, and recovery.

2. Software can outlive hardware

The application that made Power5 valuable may still be the hardest part of the move. Put code, database, license, and vendor support into the first meeting.

3. Activated capacity changes the story

Two systems with the same model can have very different usable capacity. Carry feature codes and activated resources into every comparison.

4. Reliable is not the same as recoverable

A machine can run for years and still fail the day the only backup, tape drive, part, or experienced person is needed.

5. Delay is a purchase too

Another year buys time, but it also buys maintenance, electricity, scarcity, old software limits, and another year of migration risk.

A fair Power5 and Power11 comparison has three columns

Keep unlike numbers apart

QuestionPower5 evidencePower11 evidence
What did the purchase cost?Original invoice, configuration, and purchase yearCurrent quote with the same included scope
What does it cost to run?Maintenance, electricity, cooling, software, people, and recoverySupport, electricity, cooling, software tiers, migration, and recovery
How much work can it do?Measured CPW or rPerf, memory, I/O, batch, and partitionsFeature-code performance, memory, I/O, virtualization, and growth headroom

Do not divide purchase price by core count across generations. The number looks precise and answers the wrong question.