Acer Altos R500, User Manual

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1 System overview 4
Memory
The four DIMM sockets on board accept using 64-, 72-, 128-, 144-,
512-MB and 1-GB SDRAM (synchronous DRAM) DIMMs for a maximum
memory upgrade capacity of up to 4 GB. For data integrity, the default
setting of the ECC (error-correcting code) function of the memory
system in BIOS is enabled. See “Memory/Cache Options” on page 87
for more on this BIOS setting.
Note: The SDRAM should work under 3.3 volts only; 5-volt
memory devices are not supported.
The mainboard supports both 200 and 266 MHz SDRAM DIMMs
(PC-1600 and PC-1200).
System chipsets
Server Works RCC chipset
The Server Works RCC chipset was specifically designed to meet the
needs of high performance systems. It consists of following
components:
• HE-SL-T (north bridge) provides the host interface, memory system
control interface and PCI interface.
• CIOB2 (I/O bridge) is a peripheral chip that performs PCI bridging
function between the hub interface and the PCI bus. It can provide
arbitration support for six PCI devices and manage 2 x 66 Mhz PCI
slots.
• CSB5 (south bridge) integrates LPC interface and super I/O
functions like keyboard and mouse interface, floppy disk
controller, advanced digital data separator, serial port, on-chip 12
mA AT bus drivers, one floppy direct drive support, and Intelligent
Power Management (IPM) support.
aa r500.book Page 4 Thursday, September 20, 2001 11:06 AM