AMD posted gains in both revenue and profit in the first quarter, citing lower prices but higher unit sales of microprocessors compared with a year earlier.

The chip maker announced Thursday that its revenue was US$1.61 billion, up 2 percent from the first quarter of last year. Its net income reached $510 million, or $0.68 per share, up from $257 million, or $0.35 per share, a year earlier.

Excluding certain items, the company posted net income of $56 million, or $0.08 per share, a figure that beats the $0.05 consensus forecast of analysts polled by Thomson Reuters. The company's revenue matched the analysts' forecast.

However, AMD said Monday that it expects its revenue to be flat or down sequentially in the second quarter of 2011.

The first quarter marked the commercial debut of AMD's first Fusion APU (accelerated processor unit) for laptops, code-named Llano, which the company said incorporates the kind of graphics capability available from separate graphics chips.