[althekiller]

Running out of memory is a pretty good reason to freeze. I dunno what you're on about when you say "no control over the GPU," but lack of RAM is why 1080i works so poorly. It is the RAM for textures (ie that addressed by the GPU) that is the problem. The only solution would be to control where different bits of memory are allocated, keeping textures in the lower 64MB and stuff that only the CPU has to see in the upper 64MB. However, the small number of people who this would benefit and the lack of dev interest on Xbox will pretty much ensure that this never happens.