Supports Slot-1 base single / dual CPU from Celeron^TM to Pentium^® III up to 100MHz FSB

Intel^® 440BX chipset

Four / Three 168-pin DIMM sockets up to 1GB / 768MB SDRAM

No chipset under CPU, less heat problem

CPU : Slot-1 base support single ( ROCKYP258BX ) / dual ( ROCKYP228BX ) Celeron^TM / Pentium^® III up to 100MHz FSB

System Memory : 
--> ROCKYP258BX : Four 168-pin DIMM sockets up to 1GB SDRAM
--> ROCKYP228BX : Three 168-pin DIMM sockets up to 768MB SDRAM

System Chipset : Intel^® 440BX chipset

BIOS : AMI PnP Flash BIOS

Super I/O :
--> 2 x RS-232 ports
--> 1 x parallel port ( support SPP/EPP/ECP mode )
--> IrDA port

USB ports : one port on the bracket and one by pin-header ( ROCKYP258BX ) or two ports by pin-header ( ROCKYP228BX ), meets USB ver.1 standard

IDE : Dual Ultra DMA33 interface with tow 40-pin pin-header

FDD : One port

Watchdog Timer

LM78 hardware monitoring chip on board 

SSD : One DiskOnChip^TM socket

ISAPLUS^TM : Designed to enhance the ISA bus drive capability

E²Key^TM : A non-volatile 1Kbit EEPROM is provided to retain application critical read/write data

Supports ATX power control function

Power Consumption : 
--> ROCKYP258BX : 6.8A@+5V, 120mA@+12V, 50mA@-12V ( Pentium^® II 450MHz CPU and 512MB SDRAM )
--> ROCKYP228BX : 8.6A@+5V, 350mA@+12V, 50mA@-12V ( Pentium^® II 450MHz CPU and 512MB SDRAM )

Operating Temperature : 0^o ~ 55^oC ( CPU needs cooler )

Relative humidity : 5 ~ 95%, non-condensing