Party Poker CPU usage

[AlexHoops]

I have a Dell Inspiron 9100 Pentium 4 CPU 2.80GHz, 512 MB RAM

When at party poker I have 10 tables open, PT, PAHUD, and PartyMine(sometimes close this before I start to play). While I'm playing I notice that my computer takes a bit longer to react and I have to click several times for it to register, but my CPU usage ranges from 10%-60%. However, when PT updates every 5 minutes it is a huge system drain (as expected) and my CPU usage ranges from 97%-100%, my computer as a whole slows down it reaction time, and my fan instantly goes crazy.

If I upgraded to 1256MB RAM what would the effect be on
-Non PT update play
-PT update play
-Fan noise

What about maxing out my system to 2GB RAM, something that I plan to do if/when I need too.

Does anybody have any ideas on how to keep the fan on my computer from being so loud. If my computer is on during the day it constantly droning in the background. I have a cooling pad, which helps, but most computers are quieter in use than mine idling.