|"Just plug a new dvd drive and and update all drivers"|
CD/DVD drives don't need special drivers, the drivers are built into the OS. And drivvers have nothing to do with the BIOS.
Why did you install a Quadro 600? Do you do a lot of CAD & 3D work? It's a weak card with low power requirements. It's only rated at 40W so unless your 550W PSU is a complete POS, there should be no reason to replace it. The Quadro 600 is roughly equivalent to a GT630 (which is considered a HTPC card) but it costs 2-3 times as much.
What about the rest of your system specs? Which board revision do you have? Is your CPU overclocked? Are you using the correct RAM? Have you disabled the onboard graphics? Have you ever updated the BIOS version?