Power 10 Power Requirements
IBM Power 10 power requirements by machine type: rated voltage, maximum watts, thermal output in BTU per hour, weight and rack units for the S1012, S1014, S1022, S1024, L1022, L1024, E1050 and E1080, plus IBM's measured draw figures.
Power 10 spans a wider electrical range than any Power generation before it. The S1012 is a 4U machine you can run off a standard office circuit. The E1080 is a five-rack-unit node rated at 4,500 W, and you can put four of them in one system. Planning either one from a generation-level number gets you the wrong room. This page gives IBM's published rating and IBM's own measured draw for each Power 10 machine type.
Power 10 power requirements by machine type
IBM published electrical and physical ratings, Power 10 family
| Machine type | Model | Operating voltage | Max power | Max thermal | Weight | EIA |
|---|---|---|---|---|---|---|
| 9105-41B | S1014 | 100 - 127 or 200 - 240 V ac | 1,075 W | 3,668 BTU/hr | 43.5 kg rack, 47.6 kg tower | 4U |
| 9105-22A | S1022 | 100 - 127 or 200 - 240 V ac | 2,240 W | 7,643 BTU/hr | 32.2 kg | 2U |
| 9105-22B | S1022s | 100 - 127 or 200 - 240 V ac | 2,240 W | 7,643 BTU/hr | 32.2 kg | 2U |
| 9786-22H | L1022 | 100 - 127 or 200 - 240 V ac | 2,240 W | 7,643 BTU/hr | 32.2 kg | 2U |
| 9105-42A | S1024 | 200 - 240 V ac | 2,750 W | 9,383 BTU/hr | 43.5 kg | 4U |
| 9786-42H | L1024 | 200 - 240 V ac | 2,750 W | 9,383 BTU/hr | 43.5 kg | 4U |
| 9043-MRX | E1050 | 200 - 208 / 220 - 240 V ac | 4,950 W | 16,889 BTU/hr | 69 kg | 4U |
| 9080-HEX | E1080 | 200 - 208 / 220 - 240 V ac | 4,500 W per node | 15,355 BTU/hr per node | 81.6 kg per node | 5U per node |
All models are single phase at 50 or 60 Hz plus or minus 3 Hz. Only the 9105-41B fitted with 1200 W power supplies supports the 100 - 127 V ac range. The E1080 line is per system node: a four-node E1080 is four times these figures plus a 2U system control unit, giving a system that is 22U and rated near 18 kW before storage or networking.
The S1024 and the Power 9 S924 carry exactly the same 2,750 W rating and the same 4U footprint, and the S1024 does substantially more work inside it. That is the practical facilities argument for the generation move: the room does not change, the capacity does. The exception is the E1050, which at 4,950 W is the heaviest single drawer IBM has shipped in this class.
What a Power 10 actually draws
IBM files measured power figures for these machine types in its EU ecodesign technical documentation, testing a high-end and a low-end configuration of each. Those numbers are the ones worth sizing a UPS and a cooling budget against. The ratings above are the ones an electrician and an inspector work from.
IBM measured idle and maximum power, Power 10 machine types
| Machine type | Model | Sockets | Measured idle | Measured maximum | Rated maximum |
|---|---|---|---|---|---|
| 9028-21B | S1012 | 1 | 173.2 ... 186.9 W | 270.7 ... 358.0 W | Not separately published |
| 9105-22B | S1022s | 1 | 307.7 ... 316.1 W | 393.5 ... 466.7 W | 2,240 W |
| 9105-22B | S1022s | 2 | 446.6 ... 457.2 W | 624.8 ... 792.2 W | 2,240 W |
| 9105-22A / 9786-22H | S1022 / L1022 | 1 | 346.1 ... 417.5 W | 566.4 ... 807.6 W | 2,240 W |
Each range runs from IBM's tested low-end configuration to its tested high-end configuration. Source: IBM Technical Documentation for EU Regulation 2019/424. All Power 10 entries are declared operating condition class A3, a wider allowable temperature band than the A2 class used across Power 9. Machine types absent from this table are ones IBM has not filed a cleanly readable measurement for, not ones that draw nothing.
The S1012 is the outlier worth knowing about. At a measured 358 W flat out it draws less than a two-socket Power 9 S922 does sitting idle. For a small IBM i shop replacing an S914, that is the difference between needing a dedicated circuit and not.
The A3 class change and what it buys you
Power 10 machines are declared to ASHRAE operating condition class A3, where most of Power 9 sat at A2. In plain terms the allowable inlet temperature range widens to 5.0 to 40.0 degrees Celsius, against the narrower band the older machines were tested to. That does not mean running a room hot is free, because fan power and component life both move against you, but it does mean a Power 10 has more tolerance for a cooling excursion than the Power 9 it replaces. Recommended inlet stays at 18.0 to 27.0 degrees Celsius.
Sizing the circuit from these numbers
Rating drives the circuit
An S1024 at its 2,750 W rating on a 208 V single-phase feed draws about 13.2 A. At the usual 80 percent continuous-load derating that is a 20 A circuit per machine, per feed, and a redundant pair of supplies wants two of them from separate sources.
Measurement drives the UPS
Battery runtime is calculated against real load. An S1022s measured at 792 W will run far longer on the same UPS than its 2,240 W rating suggests, so sizing to the rating usually means paying for runtime you already have.
Cooling follows BTU
One ton of cooling removes roughly 12,000 BTU/hr. A single E1050 at 16,889 BTU/hr is more than a ton on its own. A four-node E1080 at 61,420 BTU/hr for the nodes alone is a five-ton problem before anything else in the rack.
Plan the enterprise machines per node
Every published E1080 figure is per node. Nothing about a four-node system can be inferred by reading the single-node number and assuming the rack will cope. Size the feed, the PDU count and the cooling against the populated node count.
Sources: IBM's Power 10 server specifications and the E1080 specifications for ratings, and IBM's EU Regulation 2019/424 technical documentation for measured figures.
Confirm the machine type you are planning around on the Power 10 models page, and check the processor feature on the Power 10 CPU reference, because processor feature and memory count are what place a machine inside the measured range above. If you are comparing generations for a room that cannot change, Power 9 vs Power 10 and Power 10 vs Power 11 carry the capacity side of the same decision. For the cross-generation facilities walkthrough see AS400System.com's Power server power requirements guide.