Frame Rate Help Needed

Hello first off i what to say "great Product" with the Queen both pax and cargo.i would like to know alittle about frame rates and stuttersand what i can do to improve my simming i just took a flight from Klax--Ksea in the 747-400Fnow it was a complete 2d no virtual cockpitmy take off from la had frame rates of 10.8 to 16.8cruise was 26.4 to 29.9but on approach to sea and landing in sea as well as taxii got 10.7 to 04.1 as well as some stutters but no quick freezesi have no add ons except for your product my sliders at near max to max in terms of all detailmy system specs are Gateway 500XL PC WIN XPIntel P4 2.6GHz P4 Processor w/800FSB1GB DDR SDRAM (2-512MB Modules)128MB NVIDIA GeForce FX 5200G w/TV-OUT GraphicsMicrosoft Sidewinder 2 Joystick i can upgrade to 1.5 gbs if neededwhat is more important the Processor or the Ram?oh and i know killing the sliders would help but i would like to avoid that for now if possiblethanks all in advance for your help a3ifs40