I picked some parts for my new build and it says something about my case supporting video cards up to 350mm long, but video cards over 210mm may block drive bays and the video card I have chosen is longer than 210mm long. Is this important and do I need to change my parts? It also says Fractal Design Core 1000 USB 3.0 MicroATX Mid Tower Case has front panel USB 3.0 ports, but the Asus M5A78L-M/USB3 Micro ATX AM3+ Motherboard does not have onboard USB 3.0 headers.