Hi Tugo,
Welcome to PCHF.
You will only notice a performance increase after adding
RAM, is if your were actually using that
RAM in the first place. Once all the
RAM is used up, temporary data is stored on the HDD instead, which is of course slower.
One thing I would recommend if your video editing, is to make sure your HDD is at least 7200rpm.
Another thing to consider is that Windows XP will not recognise any more than 3gb of
RAM. I personally have 2gb and rarely use more than approx 600mb. Double check your needs and how they will benifit you before making these kind of purchases. To find out for example, how much
RAM your using, press [CTRL] + [ALT] + [DEL], and click on the
Performance tab. From here you will see how much
RAM you have available when you have all your applications up and running.
I don't really understand why so many people believe that upgrading their
RAM will increase performance. As I said, you will only notice a difference if you were running out of memory in the first place. Most noticable increases in performance is faster motherboard,
CPU and HDD. Use the Performance monitor to check what is going on with your system. If your
CPU usage is high when your not doing anything on your PC, then there's obviously some program using those resources.
I hope this helps.