As we have discussed about the http://techdhoom.in/index.php/2018/05/27/what-is-ram/ before. So we hope you got all from That.
Now lets talk about High Speed RAM. Some time we got confuse about it. Actually High Speed RAM is our Static RAM. As we know static RAM is very much faster then dynamic RAM. Its our Cache memory. Its used in the processor of Computer. The cache controller 1st fetch the needed information from the Cache Memory or Static Ram or High Speed RAM and then it got cache miss from the fetch then it goes to the dynamic RAM or the general RAM we are physically seeing.