Rambus Inc. shares rose 17% after a trade publication reported that computer memory makers can't agree on a standard to compete with the company's products. Mountain View-based Rambus makes high-speed chip-to-chip interface technology, which it says will be included in the next generation of microprocessors from Intel Corp. EE Times reported in its online edition that Samsung Electronics Corp., NEC Corp. and a consortium made up of Fujitsu Ltd., Mitsubishi Electric Corp. and Toshiba Corp. are all pushing different technologies to speed communications between computer chips. Rambus refused to comment on the EE Times report. Its shares closed up $12.13 at $84.50 in Nasdaq trading of 1.47 million, more than three times the average daily volume since the company went public May 14. Rambus "would face less competition" if the memory makers can't agree on a standard, said Martin Reynolds of Dataquest Inc., a San Jose market research firm.