Yeah, it was set to retail. I noticed a /!\ in DXDiag about the debug dll, though... I deleted it (sent it to the Recycling Bin, I'm probably gonna restore it after this post), but it made no difference, and only greyed out that paft of the control panel. I'm using my little Irrlicht.NETCP program to benchmark right now. Direct3D 8, fullscreen, ...