#CPU_7th {
    background: url("../images/cpu_1920.jpg") center center no-repeat;
    height: 777px;
}

#CPU_7th .frame {        
    position: absolute;
    left: 641px;
    top: 291px;
    width: 710px;
}

@media screen and (max-width: 1366px) {
    #CPU_7th {
        background-image: url("../images/cpu_1366.jpg");
        height: 575px;
    }
    #CPU_7th .frame {       
        left: 496px;
        top: 172px;
        width: 450px;
    }
}

@media screen and (max-width: 960px) {
    #CPU_7th {
        background-image: url(../images/cpu_960.jpg);
        height: 710px;
    }
    #CPU_7th .frame {                       
        position: static;
        text-align: center;
        margin: 0 40px;
        padding-top: 60px;
        width: auto;
    }    
}

@media screen and (max-width: 640px) {
    #CPU_7th {
        background-image: url(../images/cpu_640.jpg);
        height: 640px;
    }
    #CPU_7th .frame {
        margin: 0 10px;
    }
}