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IBM Power System E850C: Technical Overview and Introduction
1.1 Systems overview
The following sections provide detailed information about the Power E850C system.
1.1.1 Power E850C server
The Power System E850C server offers new levels of performance, price/performance, and
function with POWER8 technology using a 4-socket server. The Power E850C server
provides these features:
Up to 48 POWER8 cores
Up to 4 TB of DDR4 memory on a 4-socket server
Up to 51 Gen3 PCIe slots
Integrated SAS controllers for integrated disk/SSD/DVD bays
Up to 1,536 SAS bays for disk/SSD with EXP24S I/O drawers
The Power E850C server is a single enclosure server that uses IBM POWER8 processor
technology. It can be configured with two, three, or four processor modules with one machine
type-model (8408-44E).
The minimum processor configuration is two processor modules. However, with this
configuration, only 7 of the 11 internal PCIe slots function. With three processor modules
configured, 9 of the 11 PCIe slots function, and with four processor modules configured, all
11 PCIe slots are available for use.
The processor and memory subsystem in the Power E850C server is contained on a single
planar. This CPU planar contains the four processor sockets and 32 memory Custom DIMM
(CDIMM) slots. The minimum system configuration that is supported is two processor
modules and eight CDIMMs. The rules covering the general offering is a minimum of four
CDIMMs per processor socket populated.
The I/O subsystem in Power E850C consists of an IO planar, storage controller card, and a
storage backplane. The IO planar supports 10 general-purpose PCIe Gen3 slots for full
high/half length adapters. An additional (11th) slot is defaulted to the LAN adapter. Eight of
the 11 slots are Coherent Accelerator Processor Interface (CAPI)-capable. The storage
controller card contains two storage controllers that drive four SFF (2.5 in.) and eight 1.8 in.
bays.
Three versions of the storage controller card are available:
High performance dual controller with write cache
Dual controller without write cache
Split disk backplane
Up to 11 PCIe Gen3 slots are provided in the system unit. The number of PCIe slots depends
on the number of processor modules:
Two processor modules provide seven PCIe slots
Three processor modules provide nine PCIe slots
Four processor modules provide 11 PCIe slots
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