So I managed to get a free 512M PC2300 card@142 MHz (infineon). Added it to my 1G PC3200 (200MHz) card (corsair). I now have 1.5G, and the net speed actually dropped below the lowest (128MHz) as measured by one of those hardware test programs (can't remember the name right now). Don't really see an observable difference either way. Anyone have any good test or battery of tests in a suite to verify one better than the other? Most google searches turned up forums suggesting 1G at higher speed is better than 1.5G at lowered speed (I can see the logic at low memory requirements). Experience/thoughts appreciated. (Ran a few hogs like photoshop and full screen camtasia vids simultaneously; dropped mem availability to 900M, but no performance degradation noticable).