Power 12 Power Requirements
What can and cannot be said about IBM Power 12 power and cooling requirements: no announced machine types means no published electrical figures, so this page ranks every facilities question by confidence and shows what the Power 9 to Power 11 record actually supports.
There are no Power 12 power requirements, because there are no Power 12 machine types. IBM has not announced a model, a machine type, a socket count or a chassis, and every electrical and thermal figure IBM publishes is tied to a specific machine type. Anyone quoting a Power 12 wattage or BTU figure today is quoting something that does not exist. What can be done honestly is to say what the last three generations actually did, label the confidence on each inference, and set out how to build a room now that will not need rework later.
This site publishes no core counts, clock speeds, CPW or rPerf figures, prices, or electrical specifications for an unannounced generation. Everything below is either a confirmed published figure for a shipping generation, or a clearly labelled projection from the record.
Facilities questions ranked by what can actually be answered
Power 12 power and cooling questions by confidence level
| Question | Confidence | What can be said |
|---|---|---|
| Will Power 12 machines accept 200 - 240 V ac single phase? | Pattern-based projection | Every Power scale-out and midrange machine from Power 6 to Power 11 has been single phase at 200 - 240 V ac, with 100 - 127 V ac supported only on the smallest models. Nothing suggests a break, but no figure is published. |
| Will an entry Power 12 run on a standard 120 V circuit? | Pattern-based projection | The entry model has supported 100 - 127 V ac in every generation from Power 6 through Power 11, including the Power 11 S1112. A room wired for an S1112 is the most defensible bet available. |
| What will a Power 12 scale-out machine be rated at? | Not answerable | No machine type exists to rate. The Power 9 to Power 11 record shows scale-out ratings drifting up slowly while capacity rises far faster, but a rating cannot be projected onto an unannounced chassis. |
| Will Power 12 need more cooling than Power 11? | Not answerable | Thermal output is derived from the rating, so the same limitation applies. The direction of travel across three generations has been more work inside a broadly similar envelope. |
| Will Power 12 stay in ASHRAE class A3? | Pattern-based projection | Power 10 and Power 11 are both declared class A3, widening the allowable inlet range from the A2 used across most of Power 9. A room built to A3 tolerances is the current standard. |
| Should I hold a refresh waiting for Power 12? | Analyst speculation | No announced date exists. Holding a facilities project for an unannounced generation trades a known plan for an unknown one. |
Confidence labels follow this site's standing discipline: confirmed, IBM-stated direction, pattern-based projection, and analyst speculation. Nothing in the table above is labelled confirmed, because no confirmed Power 12 facilities statement exists.
What the record actually shows
The only defensible basis for planning is the published rating history of the shipping generations. These are IBM's own figures for machine types that exist, and they show a pattern worth understanding before projecting anything onto it.
Rated maximum power by equivalent class, Power 9 to Power 11
| Class | Power 9 | Power 10 | Power 11 | Direction |
|---|---|---|---|---|
| Entry | S914, 1,600 W | S1014, 1,075 W | S1112, 550 W | Down sharply |
| 2-socket 2U | S922, 1,880 W | S1022, 2,240 W | S1122, 2,600 W | Up steadily |
| 2-socket 4U | S924, 2,750 W | S1024, 2,750 W | S1124, 2,950 W | Broadly flat |
| Midrange 4-socket | E950, 4,220 W | E1050, 4,950 W | E1150, 5,400 W | Up steadily |
| Enterprise node | E980, 4,130 W | E1080, 4,500 W | E1180, 4,850 W | Up steadily |
All figures are IBM's published maximum ratings for shipping machine types. The pattern is consistent: the entry class has fallen by roughly two thirds across two generations, while the upper range has risen by 7 to 38 percent depending on the class. If that pattern held into a further generation, the small machine would keep getting easier to site and the large one would keep getting slightly harder. That is a pattern, not a specification.
How to build a room now that will not need rework
Plan to the current generation, not a future one
Power 11 is shipping and fully specified. A room built correctly for the Power 11 machine you would buy today is the only plan that can be validated against published figures, and it is the plan most likely to still be correct later.
Reserve headroom rather than guessing a number
The useful hedge is spare capacity, not a projected wattage. Reserve circuit, PDU, UPS and cooling margin in the room, and reserve rack units. Headroom is generation-agnostic in a way that any specific figure is not.
Standardize on 200 - 240 V ac single phase
Every Power machine above the entry class from Power 6 through Power 11 has required it. Wiring a room for it removes the single most common electrical surprise in a generation change, whatever the next generation turns out to be.
Build cooling to A3 tolerances
Power 10 and Power 11 are both declared class A3, with a 5.0 to 40.0 degree Celsius allowable inlet range and an 18.0 to 27.0 degree recommended range. A room that holds the recommended range with margin is well positioned regardless of what comes next.
When IBM announces Power 12 machine types, this page gets rebuilt around the real published electrical and thermal figures, in the same shape as the Power 9, Power 10 and Power 11 pages on the sibling sites. Until then it stays a confidence-ranked assessment rather than a specification table.
Sources for the rating history: IBM's Power 9, Power 10 and Power 11 server specifications.
For the rest of this site's position on an unannounced generation, see the Power 12 roadmap outlook, Power 11 against Power 12, and planning for a Power 12 transition. If you are sizing a room for a machine you can actually buy, the Power 11 figures are published in full on Power 11 power requirements.