Ok so, I now know what the problem is, it isn't anything to do with the memory. I opened her up the other day and had a look inside.
When I push the on button for the computer it will turn on, and the power will kinda drop out and stop for a second and then start back up, then the beeping noise will start as it starts to load.
The beeping noise is created as a warning because the cpu fan is not running... However it sometimes does run, sometimes not. Now I think that the problem is that my power supple isnt big enough? It is a Thermaltake 430W with a max load of 500W. My comp specs are in my sig. What's up with it? either that or my cpu fan is stuffed.