The RM9000 series of SOCs is the successor of the RM7000 series of processors. It features clockrates of upto 1GHz, 16kB instruction cache, 16kB data cache, 512kB second level cache but no tertiary cache unlike the RM7000. The CPU core of the RM9000 series is also known as E9000.
Gemini 1.6 (single core, no support for HT), Gemini 1.7 (HT supported), Gemini 2.0 (SMP with RAMDISK only and HT). Gemini 1.6 and 1.7 is based on the Rm9000 while the Gemini 2.0 is based on the Rm9000x2
Clock rates of Titan can go upto 1.2 Ghz. Titan is based on Rm9000x2 (also called GL internally)