Hi guys,

I finally got another stick of Corsair XMS3200 (1024MB total now) to allow dual-channel on my P4P800 motherboard.
Now, since I only have a P2.4B (533MHz) running at 2.8GHz (620MHz), my motherboard only allows my memory to run on a 4:5 cpu/mem ratio - which translates to 387MHz DDR. In dual-channel mode, my theoretical bandwidth should be roughly twice that - 775MHz.
Now, my question is, since I'm not running on a 800MHz fsb, my theoretical memory bandwidth should be bottlenecked by my FSB (620MHz), correct?
Because I did some Sandra tests, and I'm only getting around 3898/3890MB/sec transfer rate. This is much better than a single stick of 3200 running at 400MHz, but I was expecting to see more. This performance limitation is due to my lower FSB, correct?

Also, another point to note, is that after the Sandra test, it reported only 79% efficiency for the memory. Is this also caused by the FSB bottleneck, or does this have to do with the dual-channel controller on my P4P800?

Thanks! I just want to make sure Im getting the most out of this rig!


-Ryan