I have a dell 3500 and have made a lot of upgrades to it. I desperately need a new case, I have a case made of cardboard right now. I am planning on getting the Corsair 750d, but I’ve read that dell has different power button and usb headers. I only have usb 2.0 on my motherboard and this case has both 2.0 and 3.0 USB ports, so I was wondering if it would still work to just use the usb 2.0 header. I also will only use two of the three 3.5” drive bays so I was think about putting the power button inside of my computer now in there so it will start. I need to keep the built in power button because I am planning on getting a new motherboard sometime in the future, but it’s probably going to be at least a few months. I don’t know if it will work since the motherboard also has a bunch of usb and other ports on the back and I don’t know if those will stick out of the case correctly. Please help. Thanks