This article was corrected on May 31, 2002.In a deal valued at roughly $1 million, IBM has sold 150 high-end computer workstations to Weta Digital, the Oscar-winning f/x house creating the visuals for the next two installments of New Line’s “Lord of the Rings” trilogy. Sale of the Intellistation systems is part of Big Blue’s attempt to bolster its presence among f/x facilities switching over to the Linux operating system and compete with tech players like SGI and Compaq. IBM already has its machines inside Sony Pictures Imageworks. Linux has been promoted for its cost savings and flexibility. Weta used SGI computers running on Linux to produce the visuals for “Lord of the Rings” and continues using the systems, alongside the new IBM stations.