There's the information that was requested, let me guess your as stumped as I am. Man I hate to buy a new processor, only to find out its not the memory controller. I think that is what it is though, if it was the mother board then the PC wouldn't boot at all no matter what memory configuration I used. I can notice the difference though especially when windows first starts, the system hangs up for a moment. I'm assuming this is due to the single channel bottle neck, both cores trying to access the memory at the same time and one has to wait for the other. That's the benefit of dual channel right? No waiting for each core.