I want a lot of help

First Issue:
I have a sapphire radeon HD 7970 dual-x oc edition and squeak when i play games and generally whatever use graphics{expept videos online,VLC etc}

my specs:
graphic card mention aboved
OS:windows 8{same thing happens at all windows}
PSU:corsai enthusiastic edition TM-850 watt v2 +80bronze {recommended also from amd site}
CPU:Intel i5 3570k 3.8ghz
Driver version:amd 13,8 beta{it happens at all version indepent if it is beta or original}
I think these are enough for what you need to know.Some games that happens this issue are bioshock infinite,crysis 3{not at meny but in game},battlefield 3{is the one with the softer squeak} etc etc.

ALL the parts are new

Second Issue-Question:
Does this gpu is enough for Battlefield 4 to play it at max setting 1080p{i want answers from guys who knows no people who say i have a gtx 580 and i play metro last light max out 1080 p with 60 fps because they dont know what they say)

Third Issue-Question:
If no at previous question do you suggest me wait for 9xxx series or go for crossfire?

EDIT:at games i dont see this squeak to make them unplayable or harm stability of pc or appear lags or whatever else but is very annoying and i want to get read of it