#cpu {
    background-image: url(../images/cpu_1920.jpg);
    height: 876px;
}

#cpu .float .txt {
    width: 1200px;
    left: 100px;
    top: 3em;
}

@media screen and (max-width: 1366px) {
    #cpu {
        background-image: url(../images/cpu_1366.jpg);
        height: 700px;
    }
    #cpu .float .txt {
        width: 400px;
        top: 0em;
        left: 480px;
    }
}

@media screen and (max-width: 960px) {
    #cpu {
        background-image: url(../images/cpu_960.jpg);
        height: 590px;
    }
    #cpu .float .txt {
        width: 320px;
        top: 0em;
        left: 300px;
    }
}

@media screen and (max-width: 640px) {
    #cpu {
        background-image: url(../images/cpu_640.jpg);
        height: 560px;
        background-position: center -145px;
    }
    #cpu .float .txt {
        width: 280px;
        top: 0em;
        left: 10px;
    }
}