HELP** Having trouble running FSX ?!

OKay so here is my specs :

Amd Phenom II X6 1100t Black Edition @3.79GHz
16GB DDR3 Corsair Vengeance CAS 9-9-9-24 Timings @1700MHz
1GB ATI Radeon HD 5770 :

So theres my main specs, SO... With those specs i am having trouble, i have to have everything set to practically minimum, my old single core machine did a better job!, when i fly it usually comes up with "your system has run out of available memory, please lower your settings", but when i check on several meters incl. windows own, my total RAM usage is never above 15% ?? I have no clue what is up but its annoying as hell ! is it processor, can it not handle Amd or 6 core ? or is it the Graphics card or ram ? HELP !?

Ahh good old FSX - make sure you donwload the performance patches (2 last time o looked) and it should cure most of your problems. FAX likes CPU power more than GPU.

Dont forget your PC will allocate some system RAM to the GPU for large textures etc. Its also possible it is reporting low system memory and actually mean the page file - some software wont run without it no matter how much RAM you have.

thanks for the reply ! i am running win 7 ultimate 64bit. Do you know where i can get this performance patch ??