Advanced Micro Devices' share of the x86 chip market grew 4.2 percent in the second quarter versus a year ago, while Intel lost a similar amount in the same time frame, according to new data.

Mercury Research said in its latest report that in the second quarter, AMD shipped 22.9 percent of all processors versus the 18.7 percent it shipped during the first quarter. Meanwhile, shipped 76.3 percent of all chips in the second quarter versus the 80.5 percent market share it had in the previous quarter.

Intel's market share for the second quarter was up from the same period last year when it had 72.9 percent of the market. AMD was also higher, up from the 21.6 percent of the market it held during the second quarter last year.

The total number of shipments increased 12.2 percent in the second quarter this year versus the first quarter. Year-over-year, shipments grew 15.2 percent.