Chipset:
· Intel 440BX PIIX4e AGPset

Processor Support (Slot 1):
· Intel Celeron®
- 233MHz to 333MHz
· Intel Pentium® II
- 233MHz to 450MHz

Additional Features:
· AGP graphics support
· UltraDMA/33 Hard disk support
· SDRAM memory support

Memory:
· Three 168pin DIMM sockets (3.3v unbuffered)
(2nd level cache built into CPU)
· up to 768MB of system memory
· Support for 64bit SDRAM
· Support for 72bit ECC* SDRAM
· Memory bus runs between 66MHz and 100MHz, user selectable

Connectors:
· Three 168pin DIMM sockets (see memory section)
· Five 32-bit PCI slots
· Two 16-bit ISA slots (one PCI/ISA shared)
· One 32-bit 2X AGP slot

Peripheral support built-in :
· Integrated I/O includes Dual 16550 compatible serial ports
· ECP/EPP compatible parallel port
· Floppy port
· Dual USB ports
· PS/2 style keyboard and mouse connectors
· IrDA compliant Infrared connector

Advanced features:
· SB-LINK for legacy SoundblasterTMcard compatibility
· Wake-on-LAN and Wake-on-RING cable headers
· Smart Soft power control

BIOS Features:
· Award PCI Plug 'n' Play BIOS
· APM 1.2 / ACPI / DMI 2.0 / Quick boot / Multi boot II / SMI
· Optional System Hardware Monitoring
· Flash BIOS for Free Downloadable Software Upgrades

Operating System Support:
· Windows® 95/98 and NT
· MS-DOSTM 5.0, 6.2
· PC-DOS
· OS/2TM Warp
· NovellTM
· SCO®
· Unix®
· ODT

There are a few important items that stand out on the spec sheet, such as the maximum of 768MB of SDRAM, support for Pentium 2 speeds up to 450MHz, and the inclusion of a SB-LINK header. (The SB-LINK provides real legacy support for older Sound Blaster PCI cards)

A few other hardware features that aren't listed above include the C400's two 3-pin fan power supplies (this is becoming more and more common, whatever happened to the pseudo-standard of THREE fan power supply connectors on 440BX boards?) A bank of three "dressed up for prom" DIMM slots in a spiffy white color, and legible definitions of each connector's function on the board itself.