Certain Https-pages don't open in Safari 6.0.4

When i try to open https- webpages I often get a white screen and nothing happens for minutes, while they open perfectly in Google Chrome, wich is the only reason I still use Chrome cause I thought Safari has grown a lot better over the years.. Does anyone have any idea what settings I might have to change or what could block Safari from opening up the requested pages like the one from my bank or even when I go to the check-out off the apple store.. 😀