3 ms·RAM can be increased to 16 MB and CPU speed to 48 GHz.by steve_taylor 6mo agoRAM can be increased to 16 MB and CPU speed to 48 GHz.wk_end 6mo agoI’m sorry how many Hz???IcePic 6mo agoThe 64Ultimate goes to 64MHz, the Ultimate64 cartridge goes to 48MHz "only".