AMD has signed a deal with Innovative Silicon to license a cache technology that is said to achieve five times the density of embedded SRAM and twice that of embedded DRAM. With Z-RAM (Zero Capacitor RAM) cache sizes could reach 5 MB without increasing the die. Z-RAM requires silicon-on-insulator (SOI) process, the same used by AMD to make its processors. The company will test the tech for compatibility, but did not disclose specific timetables.