Most of quadro features depends on softwares, as hardware features are present on both Gaming and Quadro cards (same PCB project), but Nvidia just lock the features as Professional VGA cards market are more profitable per unit . Nvidia used to use hardware lock in 5900 series VGA card , but with 6... family GPU the hardware lock were not instaled , using drivers to lock it up, rivaturner will skip the VGA id to unlock quadro features. So as I mentioned I use 6800 Ultra MSI vga as Quadro, as Pain mentioned, must test the VGA as some really may not be unlocked . Maybe the best way for U is get one from Ebay (and probably will be older batch , and more chance to respect Nvidia project layout). But I can tell U somenthing (I have 3 unlocked Quadro, 2 running Sli) it worths the try as U can check to FX3450 prices (at least in Brazil , quadro prices are at least 5 times over regular vga cards if product available) I bought 3 Vga and all are working as quadro, more, 2 6600 GT , 2 6800 from EVGA , were also turned into quadro for my fellows so chances are good , or get a smaller quadro model as fx 540 or fx 1100 (but it really depends on your needs, as in my office I have one engineer modeling on Catia , car parts for MB , volkswagen etc so in my case , better vga really makes diference ( our Quadro FX500 workstation is just for checking project... running models ...well we choose the 165 station...)