Analysts doubted that McAfee’s business would have much near-term impact on Intel’s bottom line.

Intel’s fortunes are tied to PCs and the computer servers that go into data centers. As such, Intel, with revenue of $35.1 billion in 2009, goes through boom-and-bust cycles as demand waxes and wanes. McAfee, with revenue of $1.93 billion last year, sells a great deal of software on a subscription basis, which can smooth out financial results from quarter to quarter and year to year.

“There are no immediate synergies that I can see,” said Stacy A. Rasgon, an analyst with Sanford C. Bernstein & Company. “It is a strategic deal, and it is a pretty rich price for a strategic buy.”

Intel will pay $48 a share in cash, a 60 percent premium over McAfee’s Wednesday closing stock price of $29.93. The deal hinges on standard regulatory approvals.

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Demand for McAfee’s core security products should rise as people look to protect their smartphones, cars and Web-ready products from Internet threats, said David G. DeWalt, the chief executive at McAfee. Consumer electronics products like phones and hand-held gadgets face fewer threats than PCs, although it is expected they will be subjected to the same torments from hackers as they gain access to the Internet.

McAfee has 17.7 percent of the market for securing computing devices, trailing the market leader Symantec, which has 36.2 percent, according to the research firm IDC. In the last couple of years, McAfee has gained ground on Symantec by signing a large number of deals with PC makers and Internet service providers to offer its security software to consumers and workers.

Intel already builds a number of security hooks into its chips. These tools can help block malicious software from disrupting a computer or give a technician the ability to fix a computer from a remote location. The purchase of McAfee would give Intel access to more security specialists and the ability to hardwire more of these types of tools into its chips.

Still, analysts noted that Intel spent plenty to obtain these security skills. “Eventually the software features will get embedded in the hardware,” said Ashok Kumar, a technology analyst with Rodman & Renshaw. “So maybe this is an expensive way for Intel to acquire domain expertise.”

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With its share price stagnant for years, Intel has been hunting for growth outside of the PC and computer server markets. In particular, Intel has decided to go after the smartphone and consumer electronics segments, which are dominated by rival chip designs.

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Intel’s growth push has been met with resistance, largely because its chips remain more expensive and power-hungry than those of rivals.

McAfee will operate as an Intel subsidiary, reporting to Renée J. James, the head of Intel’s software and services group.

In an interview, Ms. James declined to provide details on how Intel products would gain an edge over the competition through the McAfee technology.

She has led Intel’s transformation into a software powerhouse.

Last year, Intel bought Wind River for $884 million, giving it a software maker that played in the consumer electronics and wireless markets. Earlier, Intel purchased Havok, a company that provided software tools to video game makers.

Intel and Nokia also work together on the MeeGo operating system for smartphones and other consumer electronics devices, placing the companies in competition with Apple, Google and Microsoft.