Well. At the point of purchasing, I got a 4x1 kit of Dominator memory to go with the QX9650, and relied on some elpida stockish memory for the Q6600.
Thing is, at the point of assembly, the IX38 didn`t like giving the extreme multiplier to the QX9650, so it was being clocked similar to the Q6600.
Now, I have a bios that allows the QX9650 multiplier to be massaged alot more.
Thing is, this negates the requirement for the expensive ram on the QX9650 pc. Seeing as I can set the clock to 333 if I want to and change the multiplier, the good ole elpida stockish stuff will work well with it.
On the otherhand, moving the Dominator memory to the Q6600 will be a more sensible move as the multiplier is often x9, and I have managed to get the clock to around 533.
So tbh, I wouldn`t bust the bank in getting memory to go with the QX9650, just something known to be solid good performers.