Specification
| ECS KN1 Extreme | |
| CPU Support | All AMD Socket 939 processors |
| Northbridge | nForce4 Ultra (CK8-04 Ultra) |
| Memory Support | 4 slots, DDR, 4GB max, dual-channel |
| AGP | None |
| PEG16X | One PEG 16x slot |
| Southbridge | None |
| Audio | Realtek ALC655 |
| Audio Connectivity | 6 channel backplane speaker, S/PDIF output, optical output, 1x speaker, 1x line-in, 1x mic-in |
| PCI Conventional | 3 x 32-bit 33MHz PCI 2.3 slots |
| PCI Express | 2 x PCI Express 1x slots |
| IDE | 2x ATA133 compliant port from CK8-04 Ultra, 1x ATA133 compliant port from SiS180 |
| IDE RAID | RAID0, RAID1, RAID0+1 from CK8-04 Ultra and SiS180 |
| SATA | 4x SATA-300 ports from CK8-04 Ultra, 2x SATA-150 ports from SiS180 |
| SATA RAID | RAID0, RAID1, RAID0+1 on CK8-04 Ultra ports, RAID0, RAID1, RAID0+1 on SiS180 ports |
| Networking | Realtek RTL8110S Ethernet Controller, 10/100/1000Mbit, Realtek RTL8201BL Ethernet Controller, 10/100Mbit, |
| USB | CK8-04 Ultra, 4 x backplane USB2.0, 6 x I/O USB2.0 |
| FireWire | TI TSB43AB22 FireWire 400, 2 x I/O Firewire |
| Other I/O | PS/2, 1x Serial (via cable) |
As per the specification of the nForce4 Ultra chipset, the KN1 Extreme is a feature-rich beast indeed. Three ATA ports, 6 Serial ATA ports, dual network adapters, ten USB 2.0 ports - I defy anyone to exhaust the connectivity on this motherboard. The vast majority of this functionality is delivered from the CK8-04 Ultra chipset itself, but ECS have piled on the added ATA and Serial ATA connectivity with the addition of an SiS 180 chip, bringing the number of SATA ports up from four to six (Although bear in mind that these use the SATA-150 specification rather than the SATA-300 version found on the nForce4 itself), and ATA channels from two to three, all of which are RAID capable in 0, 1 and 0+1 configurations.
Audio and network adapters are both provided courtesy of Realtek, via the ALC655 for sound and the RTL8110S controller for Gigabit ethernet, with the RTL8201BL chip providing 10/100Mbit abilities to round out the comprehensive package.
