The Mobility Radeon X300 that came with my Dell Inspiron 6000 notebook has 128MB of RAM throught a 128-bit interface. I can't seem to overclock the memory using the ATI tool. Even if I push it up a few Mhz, it would crash. Stock speeds are 300/216 (core/memory). I managed to overclock it to 415/216 fairly stably. I keep it at 405/216 just to be safe. I can't seem to do anything to the memory though. Is this a known problem? Or is my card just incredibly unclockable? I'd understand if it won't overclock well, but it won't overclock at all~! That implies that my RAM is already at full overclocking potential, or more likely there is some kind of lock on the memory. If it is the latter, is there a way to work around it? I read on another forum that someone was able to overclock their Mobility X300 64MB (64-bit) on their Fujitsu notebook to 391/283 stable. If they can pump up their RAM, can't I at all? Thanks all~ Oh yeah, I'm using the Catalyst 4.1 Drivers that were provided by the Dell website.