CS1 - Computer Systems - RAM

RAM

This is a type of computer memory that can be accessed randomly; to be precise; any byte of memory can be accessed without touching any other existing bytes. RAM is the most common type of memory found in computers and other devices, such as printers. There are two different types of RAM: DRAM (Dynamic Random Access Memory) and SRAM (Static Random Access Memory). The two types are different because of the technology they use to hold data, DRAM is the most common type. SRAM however is the fastest. DRAM also needs to be refreshed thousands of times per second while SRAM does not need to be refreshed, which is what makes it faster than DRAM. The reason why SRAM isn’t the most commonly used is due to it’s cost. DRAM is the cheap option.

DRAM and SRAM are both known as being volatile. This means that when the power is turned off all memory is lost. This is why you need to save work when shutting down the computer. When work is saved it is saved onto the hard drive.


RAM is simple to add and remove. First Look Over Health And Saftey then once you have gotten ready, you must open the case and look for the RAM slots, they should be fairly easy, they are usually away from the edges of the PC with two clips either side. Here is an example:

Then you must slot the bars of ram in, take notice of the notches in the slots, as you can see in this image there is a notch in the middle,  here is an image of the types of RAM, the only ones you should use is either DDR or SDR. as you can tell, these slots then only hold DDR. DO NOT try placing a bar of RAM in a slot with the wrong notches. Place your bar on the slot WITHOUT pushing it, double check the notches are correct and this is the right slot, then unlock the click by pulling them upwards or downwards, it is different for different PCs, carfully push the bar downwards, this locks the clips into place when you know it is in place. now you know it is safe. When removing, just unlock the clips and this will unlock the bar of RAM. remember to store it in an antistatic bag.