No, you have to uninstall them not delete them(they won’t be in your recycling bin). You should probably go to your motherboards manufactures website and download the latest drivers before installing your x1550 if you are worried, but I see no reason for you to run into any problems.
I never had a video card in my computer I just have the integrated original one so would I still have to uninstall them? I was refering to the installed ones. So is there no way I could copy the installed ones and move one of the copies to the usb slip drive?