framerates in fs9

I have too low framarates in general with 737 NG and realy bad in VC.My settings in fs9 is HIGH and traffic at 50 %, no antialiasing.I get 5-12 fps with 737 NG in VC, lowest on the ground.I get 10-14 fps with 737 NG in 2 D, lowest on the ground.When I try 737-400 default in VC, I have 14-18 fsp, which is flyableI have tried to go from HIGH to LOW setting and 10% traffic, but there is nearly no effect on framerates, locked at 25.My specs are:Pentium 4, 1.60 GHz 512 MB Ram. GeForce4, T4400 128 MB,the latest drivers.I consider buying a second machine only for flying (I can afford it)but will it help! and what shall I look for?? how big.regards OlePS I should like to be able to start and land in VC