IBM Personal System/2 Model 57 SX

Machine type 8557-045
Serial 55-LXKF2
Manufacturer IBM Corp., United Kingdom
Dated June 1992

Physical description

Type Desktop (may be converted to Floor standing) (sticker inside top cvr 02 JUN 1992, 27 APR 1992 print inside)
Dimensions (HxWxD) 169 x 440 x 394 mm
Weight 12.6 Kg
Drive bays 1 x 3.5" and 3 x 5.25", all accessible
Power supply 197 W, 110/220VAC switchable (9202M)

Main board

BIOS IBM Dec. 7, 1991(sticker on BIOS chip 15/06/92), planar id E2FE
Processor Intel 80386SX-20 MHz (32-bit) PQFP
Coprocessor Intel 80386SX (16-33 MHz) ADDITION
Memory 3 sockets for 70ns, 72-pin SIMMs (PS/2 type), parity checked (*)
Max on system board 16 Mb (about 15 Mb usable)
Bus MCA 16-bit 
Expansion slots 5 x 16-bit (1 w. video ext.) on riser card
Video Integrated VGA display adapter
Interface Integrated SCSI, FDD (2 units)
Ports PS/2 keyboard, PS/2 mouse, buffered serial (UART 16550A), parallel, VGA


Installed RAM 2 x 4 Mb 70ns SIMMs (one has 93-14), 1 x 2 Mb 70ns SIMM


Diskette drive 2.88 Mb, 3.5" slim (Mitsubishi MF356C, APR. 1992)
Hard disk WDS-380S (80 Mb) SCSI, 3.5" slim (cables WK 20/92)
2nd Hard disk WDS-3160 (160 Mb) SCSI, 3.5" slim ADDITION


Acquisition May 2000, bought for a few $ together w. some other appliances, including PS/2 system units and 8514 monitors
Condition Very good, working
Installed O.S. IBM PC-DOS 7.0, MS Windows 3.11 (Italian)
Repairs/modifications Added 2nd hard disk, math coprocessor and 2 x 4 Mb memory SIMMs (it had 2 Mb only)
Current status All hw working
Current O.S. None
Spare parts Drive, power supply, accessories


(*) Accepts 70ns SIMMs only, up to 8 Mb each.


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This page was first published on the web on Nov. 11, 2001
Last revised Dec. 31, 2004