Hi i bought a msi gtx 750 ti oc editio. To put in my nforce 680i sli mobo it is a older mobo but it is only going to be temporary, i also have. 700 w psu, the only problem i have is that when i take out the old gpu and put in The new one it does not want to start up it starts with the old one and even without the new one but not with it. From my understanding new gpu's are able to go into older slots, if its a bios update what do i do after getting inot my bios oe what do i do to fix it thanks.