Right Column is merged with content column

Hello I have a problem and I think that this has to do with the responsive style. I am facing the following problem. The right column when I am visiting my site with a desktop behaves as if it was through a smaller device. The website is www.sd-gaming.com

Please any help I would be grateful.

Thank you.

You have problem of broken div tag. Content area swallow your right column because it missed some div tag. It is maybe in some module or form content. You an try to un-publish items (modules and articles) temporally to see which one creates problem