i get the same FPS drop/stutter right as soon as it puts me in tower from signing in, just for a few seconds then my FPS are back into the 200's 3.2 quad core, triple XFX285 GTX's sli'd, 16Gig memory, 2 terabyte 32MB transfer rate HD on XP pro 64bit, it's the only game that ever does that for some reason, i run full max settings and 2048 textures ( texture options goes up to 8096 in my video options window) the game looks fantastic at these settings and never have FPS issues once I'm playing , its just that first time i enter the arena.