Must be periodically refreshed

Non volatile

Inexpensive

Very Cheap

expensive

Bit Area => Small (1T & capacitor)

Bit Area => Very Small

Bit Area => Large (>= 6T)

Speed => Fast (Larger Arrays are slower)

Speed => Slow (Multiple Steps)

Speed => Very Slow (Mechanical)

Speed Hierarchy: Virtual Memory ---> Main memory ---> Cache memory ---> CPU registers

Capacity Hierarchy: Virtual Memory > Main memory > Cache memory > CPU registers

Processor and cache can address each other

Processor and cache can transfer data between each other

Processor can address cache memory

cache can address processor

cache and main memory can address each other

cache can address main memory