Dell Inc said it had struck a deal to acquire computer services maker Perot Systems Corp in a cash transaction the personal computer maker valued at about $3.9 billion.

Dell, which had indicated its intention to step up acquisitions, said it would launch a tender offer to acquire all of the outstanding Class A common stock of Perot Systems for $30 per share in cash.

That represents a premium of about 67.5 percent from Friday's closing price of $17.91 on the New York Stock Exchange.

(Reporting by Franklin Paul; Editing by Lisa Von Ahn)