HP and Gateway introduced servers last week that feature Intel's newest Xeon 3.06-GHz processor.HP launched the ultra-dense 2U-high ProLiant DL560 server, which can have as many as four processors, last week for companies that have space-constrained data centers. Gateway also rolled out two Xeon-based servers running at 3.06 GHz last week for departments, workgroups and remote offices within large enterprises.When fully loaded, HP's DL560 runs on less than 550 watts of power, the lowest in the industry, according to HP claims.It is a rack-mounted server with as much as 12G bytes of memory that features Wide Ultra SCSI for storage connections and Gigabit Ethernet for network connections.In addition, the DL560 contains an Integrated Lights-Out processor for remote diagnosis and management, system health LEDs and the ProLiant Essentials Foundation Pack, which helps IT administrators to deploy and manage the server.The DL560 supports Windows, Linux and NetWare. It is available now starting at $7,100.The Gateway 960 and 980 are designed for small businesses that need performance at a low cost. They feature a 533-MHz system bus and as much as 512K bytes of L2 cache. Both servers are dual-processor boxes, in rack-mounted or pedestal form.The Gateway 960 starts at $2,200; the 980 starts at $3,100. The servers, which are available now, run Microsoft Windows.