Technical specifications

System configurations


Processor and Memory


1-core: POWER8 3 gigahertz (GHz)
4-core: POWER8 3 GHz

Level 2 (L2) cache

512 kilobytes (KB) L2 cache per core

Level 3 (L3) cache

8 megabyte (MB) L3 cache per core

Level 4 (L4) cache

16 MB per dual inline memory module (DIMM)

1600 megahertz (MHz) DDR4 Memory Min/Max

1-core: 16 / 64 GB
4-core: 16 / 128 GB

Processor-to-memory bandwidth

Up to 192 gigabytes per second (GBps)

Processor or I/O virtualisation: None in S812, see S814 or S822 if needed. One partition per S812

Storage and I/O

Backplane serial attached SCSI (SAS) controller options in system unit

Three: a) dual controllers with effectively up to 7.2 GB write cache b) single controller with no write cache or c) two controllers with no write cache (split back plane) Redundant Array of Independent Disks (RAID) 0,5, 6,10 capability on all three options.

Disk or solid state drive (SSD) in system unit

1-core: up to 8
4-core: up to 8 with write cache controllers or up to 12 with zero cache controllers

Easy Tier function in backplane

1-core: n/a
4-core: optional with write cache controllers.

Media bays

One slimline DVD

Adapter slots

Six peripheral component interconnect Express (PCIe) Gen3 slots with concurrent maintenance:
two x16 plus four PCIe Gen3 x8
One PCIe slot used to hold an Ethernet LAN adapter which is available for client use

I/O bandwidth

Up to 96 GBps

Expansion features (Optional)

Max PCIe Gen3 I/O drawer

0 (See Power S814/ S822 if required)

Max SAS Storage Enclosures

0 (1-core), up to 3 (4-core)

Power, RAS, system software, physical characteristics and warranty

Redundant power supplies

Single phase, 100-120V or 200-240 V

RAS features

Processor instruction retry
Alternate processor recovery
Selective dynamic firmware updates
Chipkill memory
Error correcting code (ECC) L2 cache, L3 cache
Service processor with fault monitoring
Hot-swappable disk bays
Hot-plug concurrent maintenance PCIe slots
Hot-plug and redundant power supplies and cooling fans
Dynamic processor deallocation
Extended error handling on PCI slots


AIX (4-core) or IBM i (1-core)

System dimensions

427.5 W x 86.5 H x 747.5 D mm


3 year limited warranty, on site for selected components; customer replaceable unit (CRU) for all other units (varies by country), next business day 09:00 to 17:00 (excluding holidays), warranty service upgrades and maintenance are available.