Yep! I see there are plenty around here with them so lets play around with them, theoretically theres no reason why any XL (weather it be R423 or R430) can't run as a R480 core for starters, thus using the R480 driver path, giving a performance boost, again in theory. Aside from this, theoretically an R423\R430 core has more potential for OCs because of its smaller micron process (.9 vs .11) of course, to test this particular theory it would take somebody with vmodding equipment and a XL, or somebody who wants vmods done to their XL and somebody with vmodding equipment. As most will probably be aware, the XL cores are nutorious for using low voltage (1.28v - 1.35v roughly) not only does the core theoretically hold more potential, it will also generate less heat (again all theory but well within reason given specification) and the cores have shown good resillience to voltages (up to say 1.52\1.55v on good 3rd party cooler, and possibly up to 1.7v on water) So whos game for trying this out? I'm already making some BIOS changes, just need someone whos willing to do vmods, I would, but I got rid of my equipment some time ago thinking I'd never want to vmod again, ho-hum. I'll post the BIOS I'm doing when I've tested it on my own XL so we know it won't blow any cards up.