#gaming {
    background-image: url(../images/gaming_1920.jpg);
    height: 800px;
    background-repeat: no-repeat;
}

@media screen and (max-width: 1366px) {
    #gaming {
        background-image: url(../images/gaming_1366.jpg);
        height: 700px;
    }
}

@media screen and (max-width: 960px) {
    #gaming {
        background-image: url(../images/gaming_960.jpg);
        height: 590px;
    }
}

@media screen and (max-width: 640px) {
    #gaming {
        background-image: url(../images/gaming_640.jpg);
        height: 768px;
    }
}