Leedood :
Proofy :
Pay for what ? If it's under warranty you won't have to pay for anything beside shipping the bad GPU to them. RMA is free, you will get brand new GTX 750ti or even better card if they are out of stock.
If your warranty isn't valid anymore then you'll have to buy a new card. I'd suggest GTX 960 this time
Oh yeah i forgot, sorry.To be honest I don't know what should I say to them, why its not working properly becouse you said that I shouldnt becouse i overclocked, whats the best thing to say?
Just say that your GPU started acting funny while gaming, screen freezes, fps drops etc. They will ask you did you overclock it at any point and cleaning from dust, just say that you never overclocked it and was regurarly cleaning your pc from dust
First they will try to fix it, if they can't you will get a new one.