Server Index

AS400 Servers

Every AS400 and IBM Power server model by generation, with the machine type, class and rated power draw for each, and where to go for the full specification on that generation.

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What people mean by an AS400 server

There has not been a server called an AS/400 since 2000. The name stuck to the platform anyway, and it now covers everything that runs IBM i: the original AS/400, the iSeries, the System i, and every IBM Power server since. When someone says AS400 server today they usually mean one specific machine, somewhere in that lineage, and they need to know what it is, what it needs, and what replaces it.

This page is the index. Each generation lists its machine types with the class and the rated maximum power draw, so you can find the machine you actually have. Every generation also has its own reference site with the full specification, processor options, and facilities data.

The machine type is the number that matters. A model name like S924 covers several machine types, and IBM publishes specifications, lifecycle dates and part compatibility against the machine type, not the model name. If you only know the model name, start from the generation and work down.

2004 to 2008

Power 5 servers, the eServer i5 line

The generation where the iSeries became the eServer i5 and then the System i. These are the oldest machines still occasionally found in production, and the electrical spread across the family is enormous: a 9406-520 is a 750 W machine on a standard circuit, and a 9406-595 is a three-phase 19.4 kW frame weighing more than 1,350 kilograms.

Power 5 reference site Identify your Power 5 Power 5 CPU Power 5 power requirements

Power 5 machine types

Machine type	Model	Class	Rated max power
9406-520	eServer i5 520	Entry	750 W
9406-550	eServer i5 550	Midrange	Not published by IBM
9406-570	eServer i5 570	Midrange, multi-enclosure	1,300 W per enclosure
9406-595	eServer i5 595	Enterprise frame, three phase	19.4 kW

The 9406-570 publishes its figures per processor enclosure and scales to four of them, so a fully populated system is 5,200 W across 16 rack units rather than the 1,300 W the specification sheet appears to describe.

2007 to 2010

Power 6 servers, the System i era

POWER6 pushed clock speed harder than any Power generation before or since, reaching 5.0 GHz on POWER6+. This is also the generation where IBM's published electrical figures stop describing a whole machine: the Power 570 rates per drawer, and the larger configurations stack up to four of them.

Power 6 reference site Identify your Power 6 Power 6 CPU Power 6 power requirements

Power 6 machine types

Machine type	Model	Class	Rated max power
8203-E4A	Power 520	Entry	770 W
9407-M15	Power 520, IBM i edition	Entry	770 W
9408-M25	Power 520, IBM i edition	Entry	770 W
8204-E8A	Power 550 Express	Midrange	1,500 W
9409-M50	Power 550, IBM i edition	Midrange	1,500 W
9117-MMA	Power 570	Midrange, multi-drawer	1,400 W per drawer
9119-FHA	Power 595	Enterprise frame	Not published in this set

A 32-core Power 570 is four stacked 8-core drawers: 5,600 W, 16 rack units and roughly 254 kg. Quotes written against the single-drawer figure are wrong by a factor of four.

2010 to 2014

Power 7 and Power 7+ servers

The Power 720 and Power 740 are the machines most often still running from this era. Each went through B, C and D refreshes of the same chassis, and the electrical rating moved with every one of them: a Power 720 went from 750 W to 995 W without changing its model name.

Power 7 reference site Identify your Power 7 Power 7 CPU Power 7 power requirements

Power 7 scale-out machine types

Machine type	Model	Class	Rated max power
8202-E4B	Power 720	Entry	750 W
8202-E4C	Power 720	Entry	840 W
8202-E4D	Power 720	Entry	995 W
8205-E6B	Power 740	Midrange	1,400 W
8205-E6C	Power 740	Midrange	1,570 W
8205-E6D	Power 740	Midrange	1,630 W
9117-MMB, MMC, MMD	Power 770	Enterprise	See IBM planning documentation
9179-MHB, MHC, MHD	Power 780	Enterprise	See IBM planning documentation
9119-FHB	Power 795	Enterprise frame	See IBM planning documentation

The Power 720 is the only model in this group that accepts a 120 V circuit. Every Power 740 requires 200 V or better, which is the most common surprise when a 720 is replaced by a 740 in a room wired for the older machine.

2014 to 2018

Power 8 servers

POWER8 is where the S-series naming arrived and where the scale-out line settled into the 2U and 4U shapes it still uses. On this generation the power supply feature, not the model name, decides what voltage a machine will accept, so two identical-looking S824 systems can have different electrical requirements.

Power 8 reference site All Power 8 models Power 8 CPU Power 8 power requirements

Power 8 scale-out machine types

Machine type	Model	Class	Rated max power
8284-21A	Power S812	Entry, 2U	1,225 W
8247-21L	Power S812L	Entry, 2U, Linux	1,225 W
8286-41A	Power S814	Entry, 4U	1,420 W
8284-22A	Power S822	Scale-out, 2U	1,810 W
8247-22L	Power S822L	Scale-out, 2U, Linux	1,810 W ac
8286-42A	Power S824	Scale-out, 4U	2,300 W
8247-42L	Power S824L	Scale-out, 4U, Linux	2,300 W
9080-MHE, 9080-MME	Power E870C, E880C	Enterprise node	See IBM planning documentation
9119-MHE, 9119-MME	Power E870, E880	Enterprise node	See IBM planning documentation

The 8247-22L in its DC-powered form is rated at 948 W rather than the 1,810 W ac figure. Get the power supply feature code in writing before booking a relocation on this generation.

2018 to 2021

Power 9 servers

The largest installed base still in active service. POWER9 brought PCIe Gen4 to the platform, which is why so many of these machines are still doing real work. The A-generation and G-generation machine types matter here: a 9009-41A and a 9009-41G are both an S914 but carry different service positions and different lifecycle dates.

Power 9 reference site All Power 9 models Power 9 CPU Power 9 power requirements

Power 9 machine types

Machine type	Model	Class	Rated max power
5105-22E	Power S922 entry	Entry, 2U	800 W
9009-41A, 9009-41G	Power S914	Entry, 4U	1,600 W
9009-22A, 9009-22G	Power S922	Scale-out, 2U	1,880 W
9008-22L	Power L922	Scale-out, 2U, Linux	1,880 W
9223-22H, 9223-22S	Power H922, H922S	SAP HANA, 2U	1,880 W
9009-42A, 9009-42G	Power S924	Scale-out, 4U	2,750 W
9223-42H, 9223-42S	Power H924, H924S	SAP HANA, 4U	2,750 W
9040-MR9	Power E950	Midrange, 4-socket	4,220 W
9080-M9S	Power E980	Enterprise node	4,130 W per node

IBM lists 31 January 2026 as the transition to end of support services for the A-generation 9009-41A, 9009-22A and 9009-42A. Confirm the exact machine type before planning around a support date.

2021 to 2026

Power 10 servers

Power 10 introduced the Matrix Math Accelerator, Open Memory Interface and PCIe Gen5, and widened the family at both ends: the S1012 is the smallest IBM i server IBM had shipped in years, and the E1050 is the heaviest single drawer in the line. IBM withdrew Power 10 processor sales from marketing on 31 July 2026.

Power 10 reference site All Power 10 models Power 10 CPU Power 10 power requirements

Power 10 machine types

Machine type	Model	Class	Rated max power
9028-21B	Power S1012	Entry	See measured figures
9105-41B	Power S1014	Entry, 4U or tower	1,075 W
9105-22A	Power S1022	Scale-out, 2U	2,240 W
9105-22B	Power S1022s	Scale-out, 2U	2,240 W
9786-22H	Power L1022	Scale-out, 2U, Linux	2,240 W
9105-42A	Power S1024	Scale-out, 4U	2,750 W
9786-42H	Power L1024	Scale-out, 4U, Linux	2,750 W
9043-MRX	Power E1050	Midrange, 4-socket	4,950 W
9080-HEX	Power E1080	Enterprise node	4,500 W per node

The S1024 carries exactly the same 2,750 W rating and 4U footprint as the Power 9 S924 while doing substantially more work, which is the clearest facilities case for a generation move: the room does not change, the capacity does.

2025 onward

Power 11 servers

The current generation, with DDR5 memory and on-chip AI acceleration. The entry model changes the facilities conversation rather than continuing it: the S1112 is rated at 550 W, runs on a standard 120 V circuit, and comes in a tower form for a site with no rack at all.

Power 11 reference site All Power 11 models Power 11 CPU Power 11 power requirements Power 11 benchmarks and performance

Power 11 machine types

Machine type	Model	Class	Rated max power
9242-21B, 9242-21T	Power S1112	Entry, 2U half-wide or tower	550 W
9824-22A	Power S1122	Scale-out, 2U	2,600 W
9856-22H	Power L1122	Scale-out, 2U, Linux	2,600 W
9824-42A	Power S1124	Scale-out, 4U	2,950 W
9856-42H	Power L1124	Scale-out, 4U, Linux	2,950 W
9043-MRU	Power E1150	Midrange, 4-socket	5,400 W
9080-HEU	Power E1180	Enterprise node	4,850 W per node

The S1112 is rated at roughly a third of the Power 9 S914 it typically replaces. For a single-partition IBM i shop, moving to Power 11 usually removes the electrical work from the project rather than adding to it.

Unannounced

Power 12

IBM has not announced a Power 12 name, date, machine type or specification. Any core count, clock speed, benchmark figure or electrical rating quoted for Power 12 today is describing something that does not exist yet.

What can be tracked honestly is the direction of travel across the shipping generations, and the confirmed IBM silicon work that a next generation would build on. That is what the Power 12 site does, with every claim carrying an explicit confidence label rather than a specification.

Power 12 roadmap intelligence Power 12 roadmap outlook What can be said about Power 12 power requirements

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