According to http://www.dell.com/open. Dell Inc. will officially launch its first three consumer PCs running the Ubuntu 7.04 Linux OS on Thursday -- two desktops and an Inspiron E1505n notebook PC.

The new models give buyers a third choice when shopping for a PC at Dell: a machine with Windows installed, a machine with no OS, on which they can install one of their choice, and now a machine with Ubuntu Linux already installed. Other PC makers, including Hewlett-Packard Co. (HP) and Lenovo Group Ltd. also sell PCs that run Linux, but mainly on customized machines, because retail demand for the open-source OS is tiny compared to that for Windows.

The PCs will be available in the U.S. after 4 p.m. Central Time from Dell's Web site at http://www.dell.com/open. The laptop starts at US$599, while the two desktops, the Dimension E520 and XPS 410n, start from $599(us) and $849(us) each, respectively. A comparable XPS 410 with Windows Vista Premium costs $899(us).

Dell announced what flavor of Linux it would use in the PCs, Ubuntu 7.04, earlier this month. It's the same OS Michael Dell, the chairman and CEO of the company, uses on his Dell Precision M90 laptop at home.

Dell is targeting the Linux enthusiast market with the PCs, and said the choice of systems is a response to customer feedback collected at www.ideastorm.com, a Web site set up to solicit customer suggestions. Over 100,000 people participated in surveys about the systems and what kind of Linux to install in the machines, Dell said in a statement.

The three PCs all use Intel Corp. Core 2 Duo microprocessors. The two desktops contain 1G byte of RAM and 250G bytes of hard disk space, while the laptop includes 512M bytes of RAM and an 80G byte hard disk drive.

Users will be able to choose from several hardware options on their Ubuntu PCs from Dell. The options offered contain the most mature and stable Linux driver support, and Dell plans to work with vendors to ensure more devices include Linux driver support in the future, it said.

Dell is offering hardware support for the PCs through its existing channels, with basic software help from several dedicated Web sites and Linux forums. Canonical Ltd. is offering software service upgrades from the Web site: www.ubuntu.com.

The company also created the Dell Linux Forum at www.dellcommunity.com for users to find resources, troubleshoot, discuss issues and share experiences about the new PCs.