WHAT IS DRAM? DYNAMIC RANDOM ACCESS MEMORY
DRAM chips are small but normally inexpensive because they usually require only one capacitor and one transistor to represent each bit.
In DRAM chips, the capacitors must receive an electric pulse every 15 milliseconds (ie. hundreds of times a second) to maintain the charge; if this does not happen, it looses the memory until a new charge and new memory is written to the chip.
All current day computers use small boards of dram to supply memory. These boards are called ‘DIMM’ (Dual Inline Memory Module) and ‘SIMM’ (Single Inline Memory Module) modules.
The RAM memory of a computer can be increased either by:
Reasons For Adding Memory
- Replacing current SIMMs or DIMMs with higher spec ones (ie having higher storage capacity).
- Adding more modules to vacant slots on the mother board