lagg bug cf

there are many bugs in the game that really is affecting a lot of players at the level of play, which most affects the lagg that remained after the patch .. giving each 10 to 20 seconds .... This makes the fps lagg mine mainly down to 5 to 15 FPS, usually my fps are between 20 to 30 fps ... who help me to tell me that computer could buy for this type of game.? I find it hard to kill others with this fps ... TD maps in SD .... THE FFA on the map is fine for me to kill others is GM maps.