hy the a/c I normally use is the pmdg 747 and also pmdg 737,iv got mostly international airports, but I normally fly from Liverpool,faro, Lisbon and some others from caribean,my settings are wen it comes to textures I put high only and switch off all the traffics and blooms,and to be honest by having a gtx680 I shouldn't be having this problem I tink.
once again thanks guys