PS/55 Model-Type Chart

Desktop and Tower Systems

Model Type CPU RAM MAX Socket BUS Drive interface Video
PS/55 started with model 5571- S. this model should be listed first.
5571 -Sxx 386DX-16 2MB 2 32Bit x3
16Bit x5
ESDI Display Adapter
5571 -Txx 386DX-20 4MB 8MB 2 32Bit x3
16BIt x5
ESDI Display Adapter -II
5571 -V0x 386DX-25 4MB 8MB 2 32Bit x4
16Bit x4
ESDI Display Adapter -II
5571 -V1x 386DX-25 4MB 8MB 2 32Bit x4
16Bit x4
Long 16bit SCSI Displaly Adapter-II
Desktop Models
5551 -Sxx 386DX-16 8MB 3 ESDI Displaly Adapter-II
5551 -Txx 386DX-20 8MB 3 ESDI Displaly Adapter-II
5551 -V0x 386DX-25 8MB 3 ESDI Displaly Adapter-II
5551 -V1x 386DX-25 8MB 3 32Bitx2
16Bit x2
ESDI Displaly Adapter-II
5551 -V2x 386DX-25 8MB 3 32Bit x3
16Bit x2
ESDI Displaly Adapter-II
5510 -Txx 386DX-25 x3 ESDI VGA
5510 -Sxx 386SX-16 Not MCA. These have ISA BUS.
Clasified to PS/55Z
VGA
5510 -Zxx 286-12
5540 -Txx 386DX-20 4MB 4 32Bit x2
16Bit x1
ESDI ?
5551 -W0x 486SX-20 4MB 32MB 4 32BIt x5 Short 16Bit SCSDI DBCS D/A /J
5551 -W2X 486DX2-40 4MB 32MB 4 32BIt x5 Short 16Bit SCSDI DBCS D/A /J
5551 -N0A/NAB/NAE 486DX2-66 4-16MB 32MB 4 32BIt x5 32Bit SCSI w Cache on the planar DBCS D/A /J
5551 -NXB/NMB 486DX2-66 8-16MB 32MB 4 32BIt x5 32Bit SCSI on the planar XGA-2
5551 -Yxx 486DX-33 32MB 4 32BIt x5 32Bit SCSI on the planar DBCS D/A /J
5551 -R1D 486DX2-66 4MB 32MB 4 32BIt x5 E-IDE DBCS D/A /NI-J
5551 -RXD 486DX2-66 8MB 32MB 4 32BIt x5 E-IDE XGA-2
5551 -RXE/RED/RME 486DX2-66 16MB 32MB 4 32BIt x5 EIDE + SCSI/32A XGA-2
5551 -L1C 486BL2-66 4MB 32MB 4 32BIt x5 E-IDE DBCS D/A /NI-J
5551 -LXC 486BL2-66 8MB 32MB 4 32BIt x5 E-IDE XGA-2
5551 -LEC 486BL2-66 8MB 32MB 4 32BIt x5 E-IDE + SCSI 32/A XGA-2
5521 -Y1B 486DX-33 4MB 32MB 4 32BIt x5 E-IDE DBCS D/A /NI-J
5521 -YSX/YWB 486SX33 4MB 32MB 4 32BIt x5 E-IDE SVGA, CL 28 1MB
5561 -W0x 486DX-25 4MB 64MB 8 32Bit x 6 SCSI /16A D/A-B II
5561 -W1x 486SX-25 4MB 64MB 8 32Bit x 6 SCSI /32A w Cache D/A-B II
5561 -W2x 486DX2-50 4 -8MB 64MB 8 32Bit x 6 SCSI /32A w Cache D/A-B II
5561 -Nxx 486DX2-66 8-16MB 64MB 8 32Bit x 6 SCSI /32A w Cache D/A-B II
In-a-box, Integrated Display 5530-S/T look like 8525 but all 5530 are MCA
5530 -S0x 386SX-16 4MB 16Bit x3 ESDI Stage-I
5530 -S1x 386SX-16 6MB 16Bitx3 ESDI Stage-II
5530 -Txx 386DX-20 6MB 32Bit x3 ESDI
5530 -U0x 386SX-20 3 16Bit x4 ESDI XGA
5530 -UAx 386SLC-20 3 16Bit x4 ESDI XGA
5530 -V0x 386SLC-20 3 16Bit x4 ESDI
5530 -V28/VAB/
-VX8/VXB
486SLC2-40 4-8MB 16MB 3 16Bit x4 ESDI D/A IV
XGA-2 for -VXx
5530 -Wxx 486SX-20 4-8MB 32MB 4 32Bit x4 Short 16Bit SCSI
5530 -W2x 486DX2-40 4-8MB 32MB 4 32Bit x4 Short 16Bit SCSI
5530 -Lxx 486BL2-66 4MB 32MB 4 32Bit x4 E-IDE DBCS D/A /NI-J
5530 -LXC 486BL2-66 4MB 32MB 4 32Bit x4 E-IDE XGA-2
486 Tower ( Server Model )
5580 -Yxx 486DX-33 4-8MB 64MB 8 32Bit x8 Long 32Bit SCSI w/c D/A B-II
5580 -W0x 486DX-25 4-8MB 64MB 8 32Bit x8 Long 32Bit SCSI w/c D/A B-II
5580 -W2x 486DX2-50 4-8MB 64MB 8 32Bit x8 Long 32Bit SCSI w/c D/A B-II
8595 -Jxx 486DX-50 16MB 64MB 8 32Bit x8 Long 32Bit SCSI w/c D/A B-II
9585 -5Nx 486DX2-66 8MB 64MB 8 32Bit x8 F/W SCSI-2 on the planar. XGA-2
9585 -5Kx 486DX-33 8MB 256MB 8 32Bit x8 Ditto XGA-2
9595 -6Nx 486X2-66 16MB 256MB 8 32Bit x8 F/W SCSI-2 XGA-2
9595 -5PT P-60 16MB 256MB 8 32Bit x8 F/W SCSI-2 XGA-2
9595 -5QT P-60 16B 256MB 8 32Bit x8 F/W SCSI-2 XGA-2
9595A -8NT 486DX2-66 16MB 256MB 8 32Bit x8 Raid, Passplay XGA-2
9595A -8PT P-60 16MB 256MB 8 32Bit x8 Raid, Passplay XGA-2
9595A -8QT P-66 16MB 256MB 8 32Bit x8 Raid, Passplay XGA-2

Model numbers in pink colored cells are classified as PS/55Z
For model 5538 PS/55E, click HERE.


Laptops, Notebooks, Lunch Boxes

Model sub name US, EMEA CPU RAM Max Interface Display
5523 PS55/note N33 ? 80386SX-12 6MB IDE, AT 9.5" Mono VGA
5523 PS/55note N23SX N33SX 80386SX-16 6MB *1 IDE, AT 9.5" Mono VGA
8551 PS/55 note N51SX N51SX 80386SX-16 10MB ESDI, MCA 9.5" Mono VGA
8551 PS/55 note N51SLC ? 386SLC-16 10MB ESDI, MCA 9.5" Mono VGA
5527 PS/55note N27SX CL57SX , 8554 80386SX-16 16MB
IC DRAM
ESDI, MCA 10.4" TFT, 16C
9552-Y PS/55note C52 486SLC TP700 486SLC-25 16MB
IC DRAM
ESDI, MCA 10.4" TFT, 256C
9552-J TP720C TP720C 486SLC2-50 16MB
IC DRAM
ESDI, MCA 10.4" TFT, 256C
5535-Sxx Poss None 80386SX-16 9.5" Mono VGA
8543 PS/55note L40SX L40SX 80386SX-20 18MB IDE, AT PS/55 Hi-Reso
5545-T P70-386 80386SX-20 MCA Plusma, PS/55 Hi-Reso


Cross reference of the models between PS/2 and PS/55

PS/2 PS/55 Remarks
8570 5551-S/T/V 5551 is wider than PS/2 for 1 added AVE BUS slot
8580 5571 Possibly same, except BIOS ROM
8590/9590 5561 72pin SIMM sockets x8 are mounted on the planar directly.
No XGA on the planar.
8595-xKx 5580-Yxx All 5580 use 1S1P planar
8595-xMx 8595-Jxx Same except coding. Type-3 50MHz complex.
9585 9585 Same except coding.
9595 Type 4 9595-xxx Coding is almost same between PS/2 and PS/55.
All PS/55 9595 use 2S2P planar and Type 4 complex.


PS/55 Index