i used powerstrip for 2 days a couple months ago... soo... this is totaly from the dead part of my brain, but if i remember correctly, when u change the memory setting, the core will become = to that setting...
by the way, the reason i stopped using it, is coz i woke up one morning, and my monitor was dead. supposedly nothing to do with powerstrip, but just a freaky coincidence.... i think.... anyways, no monitor now... but freaky, so no more powerstrip for me... besides the only benefit was a couple extra 3d winmarks which isn't a good benchmark anyways.
chances are if u have a radeon in any descent system, u can play todays games at most resolutions comfortable... my radeon plays at 1600x1200x32 very well, and no human eyes cannot see the difference between 78 and 82 fps.....