Intel reported third quarter 2008 earnings results that beat analyst forecasts, but the company is also giving guidance that raises concerns about future earnings.

Revenues came in at $10.22 billion, a 1% increase when compared to the same period last year and 8 percent sequentially, from Q2 2008. Analysts expected $10.26 billion.

Operating income came in at $3.1 billion, a 44% increase over the same period last year and 37% sequentially.

Net income came in at $2 billion, a 12% year over year increase and 26% sequential increase.

EPS of $0.35, a 17% year over year increase and 25% sequential increase. Analysts were looking for $0.34.

According to the company’s CEO Paul Otellini, this was Intel’s best Q3 revenues in history, but the company also said that as it looks to Q4, it will be hard to determine what the financial crisis will have on customer demand.

That statement is causing concern among analysts.