IBM 9105-22A
The 9105-22A machine type is the IBM Power S1022, the two-socket 2U Power 10 scale-out system reaching 40 cores and 4 TB of memory at a flat P10 software tier.
The 9105-22A is the machine type of the IBM Power S1022, the dense two-socket 2U member of the Power 10 scale-out line. It reaches 40 cores and 4 TB of memory in two rack units, and it stays at software tier P10 across every processor feature, which makes it the Power 10 machine type you can grow into without a licensing surprise.
The processor range on this machine type is where the real decision sits: 12, 16 or 20 cores per socket, and the clock falls as the core count rises. A 40-core build at a 2.45 GHz base is a consolidation machine. A 24-core build at a higher base clock finishes a single batch job sooner. Both are 9105-22A systems and they behave very differently.
IBM 9105-22A datasheet
IBM Power S1022 (9105-22A) published specifications
| Specification | Value |
|---|---|
| Machine type-model | 9105-22A |
| Generation | IBM Power 10 |
| Sockets | 1 or 2 |
| Maximum cores | 40 |
| Memory | Up to 4 TB |
| Internal storage | Up to 51.2 TB NVMe |
| Operating systems | IBM i, AIX, Linux |
| Software tier | P10 |
Figures are the published maximums for this machine type. A specific installed system is defined by its processor feature code and activated core count, not by the machine type alone.
Processor feature codes for the 9105-22A
S1022 processor options
| Cores per socket | Maximum cores | Typical clock range (GHz) | Module |
|---|---|---|---|
| 12 | 24 | 2.90 ... 4.0 | DCM |
| 16 | 32 | 2.75 ... 4.0 | DCM |
| 20 | 40 | 2.45 ... 3.90 | DCM |
Clock and core count trade against each other on every feature. The 12-core socket runs the highest base frequency; the 20-core socket does the most total work.
Selected Power 10 models were withdrawn from marketing effective 31 July 2026. Installed systems are unaffected, but sourcing a processor upgrade or an MES expansion now depends on availability for that specific feature code. Confirm current supply before building a plan around adding cores.
How to confirm you have a 9105-22A
From IBM i
DSPSYSVAL QMODEL returns the model portion and DSPSYSVAL QPRCFEAT returns the processor feature code. Those two values identify a 9105-22A build exactly, which is what a vendor needs to quote parts or an upgrade.
From AIX, Linux or VIOS
lsconf reports the machine type and model in the first lines of output. prtconf gives the same plus processor implementation and clock speed.
From the HMC
Managed system properties shows machine type-model and serial together with installed against activated cores. On Power 10 those two core numbers frequently differ because of capacity upgrade on demand.
From the bezel
The 9105-22A and the 9105-22B are both 2U two-socket machines and look identical racked. The suffix on the label is the only reliable way to tell an S1022 from an S1022s.
Next steps for a 9105-22A
Full processor detail is on the Power 10 CPU page and the listing is at IBM Power S1022. For sizing against the 4U machine see the 9105-42A S1024, and for capacity planning on an installed fleet see installed-base planning.