Entry by Carlos S. M.
PCChips M505

PCChips M505 Revision 2.2


CPU support

Supported sockets:
  • Socket 7
Front Side Bus speed: 50/60/66 MHz
Supported architectures:
  • AMD K5 5k86
  • AMD K5 SSA/5
  • Cyrix 6x86 M1
  • IDT Winchip 2
  • IDT Winchip 2A
  • IDT Winchip C6
  • Intel Pentium P54C
  • Intel Pentium P54CQS
  • Intel Pentium P54CS
Note! Some steppings might require updated BIOS/microcode to work properly.
Fake cache soldered on the PCB

System memory

  • Type: EDO 60/70 ns
    4x 72-pin SIMM
Max supported: 128.00 MB
Support for both EDO and FPM


Northbridge/MCH: Intel 430FX
Southbridge/ICH/PCH/MCP: Intel PIIX
SuperIO: UMC UM8663AF
1 Mbit Parallel BIOS ROM

Power supply

Main board power: AT
1 3-pin DC fan header

Expansion slots

3 PCI slots
4 16-bit ISA slots

Rear I/O ports

PS/2 keyboard
AT-style keyboard DIN connector

Internal I/O headers

2x RS232 serial
1x parallel
IrDA header


2 IDE channels, up to 33 MB/s
Floppy connector, up to 2 drives

Circuit board

Baby AT form factor


Also known as Amptron PM7500



No documents uploaded yet :(

All files are checked before upload to make sure no harmful software is included. If your antivirus software gets triggered, it's most likely a false positive.


The info you find here might not be 100% correct. This is due to a couple of reasons:
  • I'm an idiot and I misread/misspelled something
  • I have a different board revision from yours
  • The production date/plant is different and they might have used slightly different components
Feel free to improve the quality and quantity of this database by contributing with your entries. Use the contact links in the footer to get in touch.

Share this board

Latest motherboards

Gigabyte GA-EP45-UD3LR

Intel P45/Intel ICH10R motherboard for LGA775 CPUs.


VIA VT82C694X/VIA VT82C686B motherboard for PGA370 CPUs.

Gigabyte GA-EX58-UD4

Intel X58/Intel ICH10R motherboard for LGA1366 CPUs.

Latest articles

So... you want to build a Windows 98 retro PC?

By realismbro285, published 2021-05-20

A few notes on the hardware database

By bobosG, published 2021-04-19