IBM PS/2 Model 95 XP 486

IBM Personal System/2 (PS/2)
Company type	Product line
Industry	Computer hardware
Predecessor	IBM PC
Founded	1987
Founder	International Business Machines Corporation (IBM)
Headquarters	United States
Products	Personal computers (desktops, towers, all-in-one, portable, laptops, notebooks)

Adapted from the English Wikipedia article IBM PS/2 Model 95 XP 486, available under CC BY-SA 4.0Updated 9 August 2025

The IBM Personal System/2 (PS/2) series represented a collection of personal computers created by the International Business Machines Corporation (IBM). Introduced in 1987, the PS/2 marked IBM's second wave of personal computing devices, succeeding the original IBM PC line, which was phased out following the PS/2's debut in April 1987. The majority of PS/2 units incorporated the proprietary Micro Channel architecture (MCA) bus—a closed design intended to reestablish IBM's dominance in the PC sector. Nevertheless, certain budget-friendly versions continued to use the widely adopted Industry Standard Architecture (ISA) bus, an open standard from earlier IBM PC models. The PS/2 range encompassed various form factors including desktops, towers, all-in-one systems, portable computers, laptops, and notebooks.

Notes

Legend

Clarifications

Submodels identified by IBM part numbers (P/N) for sales outside North America are not listed.
Unless otherwise specified, integrated or optional displays are CRT monitors.
The Space Saving Keyboard is a compact 87-key variant of the Model M without a numeric keypad.
The Model 25 Collegiate was designed for university students and featured dual 720 KB floppy drives, up to 640 KB of RAM, and came bundled with the official PS/2 Mouse, Windows 2.0, and four blank floppy disks.
Financial workstation variants included a specialized 50-key function keypad tailored for banking uses.
LS ("LAN Stations") models were diskless workstations lacking floppy or hard drives, relying on Ethernet or Token Ring adapters for network connectivity.
Ultimedia editions were equipped with microphones and featured SCSI CD-ROM drives, M-Audio sound cards, volume controls, and front-panel headphone/microphone jacks.
Array configurations served as PS/2 Servers supporting RAID functionality.

Primary series

IBM PS/2 model lineup
Model	IBM P/N	Processor	Clock speed (MHz)	Bus	Number of slots	Number of drive bays	FDD	HDD	Default RAM	Maximum RAM	Video adapter	Monitor	Form factor	Release date	Remarks
25	8525-001	Intel 8086	8 (0 w)	ISA, 8-bit	2	2	one 720 KB	none	512 KB	640 KB	MCGA	12-in. monochrome	All-in-one	Template:Date table sorting	Space Saving Keyboard
25 SX	8525-K00	Intel 386SX	20	ISA, 16-bit	3	2	one 1.44 MB	none	1 MB	16 MB	VGA	12-in. color	All-in-one	Template:Date table sorting
30 286	8530-E01	Intel 80286	10 (1 w)	ISA, 16-bit	3	2	one 1.44 MB	none	512 KB	4 MB	VGA	optional	Desktop	Template:Date table sorting

Model	IBM P/N	Processor	Clock speed (MHz)	Bus	Slots	Drive bays	FDD	HDD	Default RAM	Max RAM	Video adapter	Monitor	Form factor	Release date	Remarks
Variants include models with Intel 386SX and IBM 386SLC CPUs, ISA bus architecture, VGA graphics, and networking options such as Ethernet or Token Ring.

Model	IBM P/N	Processor	Clock speed (MHz)	Bus	Slots	Drive bays	FDD	HDD	Default RAM	Max RAM	Video adapter	Monitor	Form factor	Release date	Remarks
Tower and desktop models featuring Micro Channel architecture (MCA), equipped with Intel processors ranging from the 80286 to i486DX. Configurations vary with RAM capacities up to 64 MB, storage options exceeding 500 MB via SCSI or IDE interfaces, and video adapters including VGA, SVGA, and XGA-2.

Model	IBM P/N	Processor	MHz	Bus	Slots	Bays	FDD	HDD	Default RAM	Max RAM	Video	Monitor	Form factor	Release date	Remarks
Representative tower and desktop units demonstrating the product range and capabilities.

Model	IBM P/N	Processor	MHz	Bus	Slots	Bays	FDD	HDD	Default RAM	Max RAM	Video	Monitor	Form factor	Release date	Remarks
IBM PS/2 Model 50	8550-021	Intel 80286	10	MCA	4	3	one 1.44 MB	20 MB (ST-506)	1 MB	1 MB	VGA	optional	Desktop	1987-04
IBM PS/2 Model 55 SX	8555-031	Intel i386SX	16	MCA	3	2	one 1.44 MB	30 MB (ESDI)	2 MB	8 MB	VGA	optional	Desktop	1989-05
IBM PS/2 Model 70 386	8570-061	Intel i386	20	MCA	3	3	one 1.44 MB	60 MB (ESDI)	2 MB	6 MB	VGA	optional	Desktop	1989-09
IBM PS/2 Model 80	8580-041	Intel i386	16	MCA	8	5/6	one 1.44 MB	44 MB (ST-506)	1 MB	2 MB	VGA	optional	Tower	1987-07
IBM PS/2 Model 90 XP	8590-0G5	Intel i486SX	20	MCA	4	=4	=one 1.44 MB	=80 MB (SCSI)	=4 MB	=64 MB	= XGA	= optional	= Desktop	=1990-10	=
IBM PS/2 Model 95 XP	=8595-0G9	Intel i486SX	=20	= MCA	=8	=8	=one 1.44 MB	=160 MB (SCSI)	=4 MB	=64 MB	= XGA	= optional	= Tower	=1990-10	=

IBM P/N \| Processor \| MHz \| Bus \| Slots \| Bays \| FDD \| HDD \| Default RAM \| Max RAM \| Video \| Monitor \| Form factor \| Release date \| Remarks
IBM PS/2 E \|9533 \| IBM 486SLC2 \|50 \| ISA (16-bit)\|4 PC Card \|1 \|one 1.44 MB \|350 MB / none (IDE) \|4 MB \|16 MB \| XGA-2 \| CRT / LCD \| Small form factor \|1993-07 \|

PS/2 Server

IBM PS/2 Server variants
Model	IBM P/N	Processor	Clock speed (MHz)	Bus	Number of slots	Number of drive bays	FDD	HDD	Base RAM	Maximum RAM	Video adapter	Monitor	Form factor	Release date
Server 85	9585-0X6	Intel 486SX	33	MCA, 32-bit	8	7	single 2.88 MB	104 MB (SCSI)	8 MB	64 MB	SVGA	optional	Tower	Template:Date table sorting
Server 85	9585-0X9	Intel 486SX	33	MCA, 32-bit	8	7	single 2.88 MB	160 MB (SCSI)	8 MB	64 MB	SVGA	optional	Tower	Template:Date table sorting
Server 85	9585-0XA	Intel 486SX	33	MCA, 32-bit	8	7	single 2.88 MB	208 MB/212 MB (SCSI)	8 MB	64 MB	SVGA	optional	Tower	Template:Date table sorting
Server 85	9585-0XD	Intel 486SX	33	MCA, 32-bit	8	7	single 2.88 MB	320 MB (SCSI)	8 MB	64 MB	SVGA	optional	Tower	Template:Date table sorting

Model	IBM P/N	Processor	Clock speed (MHz)	Bus	Slots	Drive bays	FDD	HDD	Standard RAM	Max RAM	Video adapter	Monitor	Form factor	Release date	Remarks
Additional Server 85 and Server 95 configurations share similar attributes, including Intel i486 and Pentium CPUs, Micro Channel architecture, up to eight expansion slots, multiple drive bays accommodating SCSI hard disks ranging from roughly 100 MB to several gigabytes, and RAM expandable to a maximum of 256 MB. All models feature SVGA video adapters with optional monitors and tower chassis introduced between the years of 1992 and 1994.
High-end Server models came preloaded with IBM LAN Server or Novell NetWare software, providing enhanced networking functionality suited for enterprise settings.
Server arrays such as the Server 95 Array offered increased storage capacity through three SCSI drives configured for RAID, supporting several gigabytes of data and up to nine expansion slots.
Server 295	8600-001	i486	33	Micro Channel architecture, dual, 32-bit	12	10	single 1.44 MB	400 MB/1 GB (SCSI)	32 MB	128 MB	Super VGA	optional	Tower	Template:Date table sorting	Supports hot-swappable storage up to 28 GB, compatible with RAID-5, dual processor optional; only accepts IBM-specific disks.
Server 295	8600-002	i486	50	Micro Channel architecture, dual, 32-bit	12	10	single1.44MB	400MB/1GB (SCSI)	32MB	128MB	Super VGA	optional	Tower	Template:Date table sorting	Identical to above but with increased clock frequency.
Server195	8600-003	2×i486	50	Micro Channel architecture, dual,32-bit	12	10	single1.44MB	400MB/1GB (SCSI)	32MB	128MB	Super VGA	optional	Tower	Template:Date table sorting	Equipped with dual processors by default; supports RAID-5 and hot-swappable drives.

Portables

IBM PS/2 N33SX 8533-A33 i386SX 16 style="background:#FFC" Proprietary bus 2 (PC Card) unknown one 1.44 MB 40 MB (IDE) unknown unknown unknown Monochrome LCD Notebook IBM PS/2 N33SX 8533-A35 i386SX 16 style="background:#FFC" Proprietary bus 2 (PC Card) unknown one1.44 MB 80MB (IDE) unknown unknown unknown Monochrome LCD Notebook IBM PS/2 Model CL57 SX 8554-045 IBM386SLC 16 style="background:#FFC" Proprietary bus 2 (PC Card) unknown one1.44 MB 80MB (IDE) 2MB 16MB Video Graphics Array Color TFT Laptop

IBM PS/2 portable variants
Model	IBM P/N	Processor	Clock speed (MHz)	Bus	Number of slots	Number of drive bays	FDD	HDD	Installed RAM	Maximum RAM	Video adapter	Display	Form factor	Release date	Remarks
P70	8573-031	Intel 386	16	MCA, 32-bit	2 (one 16-bit, one 32-bit)	0	one 1.44 MB	30 MB (ESDI)	2 MB	8 MB	VGA	Monochrome gas plasma	Portable	Template:Date table sorting	Optional slot for i387 co-processor
P70	8573-061	Intel 386	20	MCA, 32-bit	2 (one 16-bit, one 32-bit)	0	one 1.44 MB	60 MB (ESDI)	2 MB	8 MB	VGA	Monochrome gas plasma	Portable	Template:Date table sorting	Optional slot for i387 co-processor
P70	8573-121	Intel 386	20	MCA, 32-bit	2 (one 16-bit, one 32-bit)	0	one 1.44 MB	120 MB (ESDI)	2 MB	8 MB	VGA	Monochrome gas plasma	Portable	Template:Date table sorting	Optional slot for i387 co-processor
P75	8573-161	Intel 486	33	MCA, 32-bit	4 (two 16-bit, two 32-bit)	0	one 1.44 MB	160 MB (SCSI)	4 MB	16 MB	VGA	Monochrome gas plasma	Portable	Template:Date table sorting	Integrated SCSI controller on planar board
P75	8573-401	Intel 486	33	MCA,32-bit	4 (two16-bit,two32-bit)	0	one1.44MB	400MB (SCSI)	4MB	16MB	VGA	Monochrome gas plasma	Portable	Template:Date table sorting	Integrated SCSI controller on planar board
L40 SX	8543-A44	Intel386SX	20	ISA,16-bit	0 (1 with AT bus expansion port)	0	one1.44 MB	60MB (IDE)	2MB	18MB	VGA	Monochrome LCD	Laptop	Template:Date table sorting
IBM PS/2 N51SX	8551-033	i386SX	16	Proprietary bus	2 (PC Card)	\unknown{}	one1.44 MB	40MB (IDE)	2MB	10MB	Video Graphics Array	Monochrome LCD	Notebook
IBM PS/2 N51SLC	8551-025	IBM386SLC	16	Proprietary bus	2 (PC Card)	\unknown{}	one1.44 MB	80MB (IDE)	2MB	10MB	Video Graphics Array	Monochrome LCD	Notebook

Related systems

IBM PS/2-associated systems
Name	IBM P/N	Processor	Clock speed (MHz)	Bus	Number of slots	Number of drive bays	FDD	HDD	Standard RAM	Maximum RAM	Video adapter	Monitor	Form factor	Release date	Remarks
Academic System	6152-022	Intel 80286 ROMP 032	10 (286)	MCA, 16-bit	8	4	one 1.44 MB	20 MB (ST-506)	2 MB	8 MB	VGA	optional	Tower	Template:Date table sorting	ROMP CPU on daughterboard; cannot operate concurrently with 286
Academic System	6152-024	Intel 80286 ROMP 032	10 (286)	MCA, 16-bit	8	4	one 1.44 MB	20 MB (ST-506)	4 MB	8 MB	VGA	optional	Tower	Template:Date table sorting	ROMP CPU on daughterboard; cannot operate concurrently with 286
Academic System	6152-044	Intel 80286 ROMP 032	10 (286)	MCA, 16-bit	8	4	one 1.44 MB	44 MB (ST-506)	4 MB	8 MB	VGA	optional	Tower	Template:Date table sorting		-	(Additional Academic System variants with comparable specifications and features)	-	(Other significant models)	-	Name	IBM P/N	Processor	Clock speed (MHz)	Bus	Slots	Drive bays	FDD	HDD	Standard RAM	Max RAM	Video adapter	Monitor	Form factor	Release date	Remarks	-	"IBM Clinical Workstation"	"7690"	"Intel 8086"	"8 (0 wait states)"	Industry Standard Architecture (ISA), 8-bit"	"4"	"0"	"one 1.44 MB"	"none"	"640 KB"	"8 MB"	"Multi-Color Graphics Array (MCGA)"	"Monochrome LCD"	"Mobile workstation"	"Template:Date table sorting"	"Designed as a dedicated portable workstation for healthcare; intended to be used alongside the IBM 7496 Executive Workstation"	-	EduQuest lineup (education-oriented all-in-one units derived from Model 25)	-	Name	IBM P/N	Processor	Clock speed (MHz)	Bus	Slots	Drive bays	FDD	HDD	Standard RAM	Max RAM	Video adapter	Monitor size/type	Form factor	Release date	Remarks	-	"EduQuest Thirty"	"9603"	"IBM 386SLC"	"25"	ISA,16-bit"	"4"	"2"	"one 1.44 MB"	"30 MB IDE"	"1–4 MB"	"20 MB"	"SVGA"	"14-inch color"	"All-in-one"	"1993-03"	"Tailored for educational use, includes optional sound card; later versions lack IBM branding"	-	"EduQuest Forty"	"9604"	"Intel 486SX"	"25"	ISA,16-bit"	"4"	"2"	"one 1.44 MB"	"30 MB IDE"	"4 MB"	"20 MB"	"SVGA"	"14-inch color"	"All-in-one"	"1993-03"	-	(Additional EduQuest models sharing similar specs and educational targeting)	-	Industrial Computers (robust modular systems designed for factory and industrial environments)	-	Name	IBM P/N	Processor	Clock speed (MHz)	Bus	Slots/Modules	Drive bays/Modules	FDD(s)	HDD(s)	Standard RAM	Max RAM	Video adapter	Monitor ?? Form factor ?? Release date ?? Remarks	-	"Industrial Computer Gearbox Series"	"7552-040 / -140 / etc."	"Intel 80286 / i386 / i486 variations"	"10–25 MHz"	"Hybrid MCA/ISA buses, predominantly Micro Channel architecture with some ISA compatibility through adapters"	"Up to eight modular slots, some may remain unused"	"Up to three modular drive bays on select models"	"One or no floppy drives; some modules support up to two floppy drives (1.44 MB or higher)"	"Hard drive options vary: ST-506, ESDI, SCSI; capacities range from none to several hundred megabytes depending on configuration and model"	"Stock RAM ranges from 512 KB to multiple megabytes depending on model; expandable typically between 8 and16 MB via expansion cards"	"Video adapters include VGA or EGA; monitors are optional or monochrome/gas plasma in certain portable versions."	"Form factors encompass benchtop, rack-mounted, and rugged portable units."	"Released between the late '80s and early '90s."	-"Known for pioneering the Micro Channel architecture in industrial computing prior to the PS/2 series launch; engineered for factory-floor durability and modularity."	-	Personal Typing Systems (desktop solutions optimized for word processing and network connectivity)	-	Name	IBM P/N	Processor	Clock speed (MHz)	Bus	Slots	Drive bays	FDD	HDD	Standard RAM	Max RAM	Video adapter	Monitor size/type	Form factor	Release date	Remarks	-	"Personal Typing System Series"	"6901-001 through -006, including Personal Typing System/2 models (6907,6908)"	"Intel 8086 or Intel 80286 CPUs running approximately at 8–10 MHz with zero or minimal wait states."	"ISA bus, generally 8-bit on earlier models; some later units utilize ISA16."	"Between zero and two expansion slots."	"Two drive bays."	"One or two floppy drives (720 KB standard or optional higher capacity)."	'Optional hard disks up to roughly20–30 MB using ST-506 or ESDI interfaces.'	'Standard RAM ranges from around640 KB to1MB.'	'Video adapters include MCGA or VGA.'	'12-inch monochrome or color displays.'	'Desktop chassis.'	'Released during the mid to late '80s.'	-"Specifically designed for word processing and office environments featuring integrated software suites and optional networking capabilities; often paired with IBM Wheelwriter or Quietwriter devices."

References