In such situation it is better to activate the Lazy Loading option to load the images first when they really should be shown in the slider. Lazy Loading is only available for the Main images in the current version.Follow the steps to actiavet Lazy Loading
<li data-transition="fade" data-slotamount="7" data-masterspeed="1500" > <!-- MAIN IMAGE --> <img src="../examples&source/images/dummy.png" data-lazyload="../examples&source/images/slidebg1.jpg" alt="slidebg1" data-bgfit="cover" data-bgposition="left top" data-bgrepeat="no-repeat"> ...
<script type="text/javascript"> var revapi; jQuery(document).ready(function() { revapi = jQuery('.tp-banner').revolution( { delay:9000, startwidth:1170, startheight:500, hideThumbs:10, lazyLoad:"on" }); }); //ready </script>