If I have 3 sticks of 512MB Corsair PC3200 400MHz Dual Channel DDR RAM and a stick of 1 GB 1024MB Corsair PC5300 400MHz ect. will the Memory be compatible and at its full potential?
There's a part of me that wants to smack you and a part of me that wants to help you... You want to mix a DDR2 DIMM with 4 dual channel DDR DIMM's... Not only can you NOT do that, but even if you could the other 3 wouldn't be running in dual channel mode and the 5300 stick would only be running at 400mhz... which brings me to my next point...

1024MB Corsair PC5300 400MHz
?????