NVIDIA (Nasdaq: NVDA) shares are moving lower in late-Wednesday trading following fourth-quarter 2012 numbers.

Revenue in the quarter dropped 10.6 percent to $953.2 million, versus Street views calling for $950.5 million. Earnings were 26 cents per share after adjustments, topping consensus views calling for 19 cents per share

Most importantly, investors are looking at first-quarter 2012 guidance. NVIDIA says it expects sales of $900 million to $930 million, which came in below views calling for $844.9 million. GAAP gross margins are expected to be 49.2 percent, plus or minus 1 percentage point; non-GAAP gross margins are expected to be 49.5 percent, plus or minus 1 percentage point, in-line with the current quarter's results.

"I am pleased with our achievements last year. Our GPU business grew sharply," said CEO Jen-Hsun Huang. "And, with the success of Tegra, we established our position in the mobile market."

Shares are off about 4 percent late Wednesday.

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