Sun Microsystems is delaying the launch of a faster version of its UltraSparc IV+ processor until sometime in the next quarter, a top company executive said Thursday.The 1.8GHz version of the chip was to have appeared this quarter but will now be delayed, said David Yen, executive vice president of Sun\u2019s Scalable Systems Group at a company event in Tokyo."We are postponing the introduction of the next speed enhancement, but it\u2019s coming," he said. "Next quarter we\u2019ll move from 1.5 to 1.8 and later this year push beyond that."Yen didn\u2019t detail future speed increases for the chip, but when it was first announced in 2004, the company talked about a 2GHz version.It\u2019s not the first time the 1.8GHz version of the chip, which is used in several models of Sun hardware, has been delayed. At the 2004 announcement, Sun said it would launch the chip at 1.8GHz, but when it appeared in September last year, it was at a 1.5GHz clock speed.Yen didn\u2019t specify a reason for the delay, but the announcement followed news that Sun has caught up with demand for the 1.5GHz version of the chip. Shipments of UltraSparc IV+ processors in the last quarter were more than double those of the quarter before and will double again in the current quarter, he said."Supply has finally caught up, and any UltraSparc you order in this quarter will get delivered in this quarter," said Yen. The company also provided an update on its Solaris 10 operating system. The software shipped last year in an open source version, and Sun said there have been 4.5 million registered software downloads."Since Solaris 10, we\u2019ve seen growth in interest in Solaris worldwide," said Sun Chief Technical Officer Greg Papadopoulos. "It\u2019s been nothing short of phenomenal."He said most of the Intel and AMD installations being done are on servers from IBM, Hewlett-Packard and Dell.-Martyn Williams, IDG News ServiceFor related news coverage, read EPA, Sun to Define Energy-Efficient Server Spec and Sun Launches New Thin Clients, Ships Niagara Server.Check out our CIO News Alerts and Tech Informer pages for more updated news coverage.