How Computer Memory Works

How Computer Memory Works

1. They have short-term memories for immediate tasks that are

   • Ram
     • Each cell costs a transistor and a capacitor that store electrical charges
   • Cache
     • Ram and Cache memory can store data only when they have a power supply
     • It is small and high speed

2. has long-term memories for permanent storage which are

   • Magnetic storage
     • It's cheaper
     • The data is stored according to a magnetic pattern
     • The latency of this unit is slower than DRAM
   • Optical-based storage like DVD and Blue.ray
     • Bits are encoded as light and dark spots using a dye that can be read by a laser
     • They are cheap and removable and their latency exceeds magnetic storage
   • Flash memory
     • They use floating gate transistors that store trapped data

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