Rambus (RMBS) - Get Report was up 11.3% in early trading after a report that the company is charging royalties of 3.5% for DDR DRAM and 0.75% for SDRAM, more than analysts expected. The memory chipmaker had not previously disclosed its royalty rates for the high-speed memory chips DDR DRAM.

The disclosure came during testimony in the company's patent-infringement lawsuit against German chipmaker

Infineon Technologies

(IFX)

. Infineon was down 2.6%.