ASUS CUBX Socket 370 ATX Motherboard Intel PIII Pentium III PGA370 FC-PGA

ASUS CUBX Socket 370 ATX Motherboard Intel PIII Pentium III PGA370 FC-PGA

The ASUS CUBX is an ATX form-factor desktop motherboard built around the Intel 440BX AGPset, designed to support Intel Pentium III and Celeron processors in the Socket 370 (PGA370) form factor — covering both the earlier PPGA Celeron and the later FC-PGA Pentium III (Coppermine and Katmai cores). It pairs the stable, well-regarded 440BX chipset with a full ATX layout including five PCI slots, one AGP slot, and four DIMM slots for up to 768 MB of SDRAM.

Specifications & What's Included

• Brand: ASUS
• Model: CUBX
• Form Factor: ATX
• CPU Socket: Socket 370 (PGA370) — ZIF lever, marked PGA370 and +AMP on socket housing
• CPU Compatibility: Intel Pentium III (FC-PGA, Coppermine/Katmai), Intel Celeron (PPGA/FC-PGA)
• Chipset: Intel 440BX AGPset
• Front Side Bus: 66 / 100 / 133 MHz (jumper/BIOS selectable)
• Memory: 4 x DIMM slots — PC100 / PC133 SDRAM, up to 768 MB
• Expansion: 1 x AGP slot (blue), 5 x PCI slots (white), 1 x ISA slot
• Storage: 2 x UltraDMA/66 (ATA-66) IDE connectors, 1 x floppy connector
• Rear I/O: 2 x USB, 2 x COM (DB9 serial), 1 x LPT (DB25 parallel), PS/2 keyboard, PS/2 mouse
• Onboard Audio: None
• Onboard Video: None
• Condition: Tested and working — see condition block below
• Included: Motherboard only — no CPU, RAM, cables, or I/O shield

Applications

The ASUS CUBX dates from the late 1990s to early 2000s — the peak era of the Intel Pentium III platform, when the 440BX chipset was widely regarded as one of the most reliable and overclocking-friendly chipsets of that generation. These boards are sought today primarily by enthusiasts restoring period-correct Windows 98 SE or Windows 2000 workstations, by collectors building complete retro gaming or demo-scene machines, and by legacy industrial and scientific users maintaining equipment that requires a specific Pentium III platform. The 440BX's broad compatibility with both PPGA Celeron and FC-PGA Pentium III processors — including Coppermine cores up to 1.0 GHz — makes the CUBX a flexible choice for that era. The five PCI slots and dedicated AGP slot allow for a full complement of period-accurate expansion cards including sound cards, SCSI controllers, network adapters, and AGP graphics.