PC stuck at BIOS screen

[Gromp]

So i upgraded my pc in early january this year, specs:

GTX960 turbo oc edition
8gb ram
corsair bronze 750M
i5 2320

I think its somewhat decent, and it was fine for playing games up till a point where it crashed and couldnt be turned on for a week. Until I took out and put back in the CMOS battery it could start again. After that, my fps has dropped about 50 to 100 fps from original. I dont know what to do to fix it. Is it the mobo? cpu? or that battery? i have no idea pls help

 

[Ironsounds]

Hello... we can sure find out... B /

Let's try a proper "battery removal" AND CMOS reset Clear to the MB ...ok? B /
Take your time here and be slow and careful to your MB... look in your MB manual/Pdf for pictures and location of the pins. B )
1) un-plug PS from wall.
2) remove MB battery
3) place jumper pins/switch on MB to clear the capacitors... for ~3 mins
4) remove Jumper/switch
5) re-install battery
6) plug monitor into the MB video output.
8) plug in PS to wall
9) Boot computer.