IBM 520 - Page 21

Features at a Glance
The features in your server vary according to the model that you purchased. The following is a
summary of the features that are available with the PC Server 520.
Microprocessor
 Intel Pentium microprocessor with
16 KB of internal cache; clock rate
varies by model
 A processor upgrade, which adds
another Pentium microprocessor,
is available for symmetric
multiprocessing
Cache Memory
 512 KB of level-2 cache
Memory
 Error Correcting Code on SIMM
(EOS), 70 ns
 32 MB minimum, expandable to
256 MB
 Amount of memory is model
dependent
 Eight 72-pin, single-inline
memory-module (SIMM) sockets
Diskette Drives
 Standard: One 3.5-inch, 1.44 MB
 Optional (internal):
– 3.5-inch, 1.44 MB
– 3.5-inch, 2.88 MB
– 5.25-inch, 1.2 MB
Hard Disk Drives
 Number of drives and drive
capacities are model dependent
 Can support up to 20 hard disk
drives, 18 of them hot-swappable
CD-ROM Drive
 Standard: SCSI-2 CD-ROM
Keyboard and Auxiliary Device
 101-key keyboard
 Mouse
Expansion Bays and Slots
 Two PCI slots
 Five combination EISA/ISA slots
 One shared PCI/EISA slot
 22 drive bays, 18 of them
hot-swap
Video
 Super video graphics array
(SVGA) connector
 Compatibility:
– Video graphics array (VGA)
– Color graphics adapter (CGA)
– Multicolor graphics array
(MCGA)
Security Features
 Bolt-down capability
 Door lock
 Selectable drive-startup
 Security cover (optional)
 Supervisor and User passwords
Integrated Functions
 LED usability support
 Video connector
 Two serial connectors
 Parallel connector
 Auxiliary device connector
 Keyboard connector
 Battery-backed clock and calendar
SCSI-2 Controller
 IBM PC Server SCSI-2 Fast/Wide
PCI Adapter on non-disk-array
models
 IBM PC ServeRAID Adapter on
disk-array models
Power Supply
 434 watt with automatic range
voltage selection (115–230Vac)
 Built-in overload and surge
protection
 Power supply upgrade expansion
option
– 220 watt automatic range
voltage selection add-on
– Built-in overload and surge
protection
 IBM PC Server 780W Redundant
Power Option
– 780 watt with automatic
range voltage selection
(115–230 V ac)
– Built-in overload and surge
protection
Upgradable Power-On Self-Test
(POST) and Basic Input/Output
System (BIOS)
 Upgradable electrically erasable
programmable read-only memory
(EEPROM) on the system board
 POST/BIOS upgrades (when
available)
Chapter 1. Introducing the PC Server 520 3