frame rate is ussually locked to your monitors refresh rate hz and is the frames per second that is being viewed ,i myself cant stand 60hz and run at 85 hz .
VM is your current View mode (f1,f3,f4)
DM is what mode your in for going thru views (pan ,padlock,snap)
vid mem is how much memory is available on your video card
used is how much is currently being used
sysmem is how much memory is in your pc
used is how much of that is currently being used by the game
tex is how many textures are being filled on your screen
now the noise your hearing when pulling your stick back ... i bet its the stall buzzer or buffet noise from the game .
try hiting the X key for auto pilot and see if it disapears ..