Remember, the memory controller is on the cpu. The memory controller on the X2 4000 only supports DDR2 800. The 9650 supports DDR2 1066, so yes. You can use 1066 if you go that route.
However, the 9650 only supports one dimm per channel at 1066 speed. So 2 chips, regardless of size, running in dual channel is the max at that speed.
so can i use the 1066 on the curren proc until i get the cpu or wait and install @ the same time? so your saying with a new cpu that supports 1066 and 1066 mem it will run 1066 no matter that the board is rated for 800?
yeah i figger that 1066 cpu n mem were still on the drawing board when this board was manufact, and 1066 is the max before the ddr3 & new sockets hit the market, so i figure i can max it out w/out oc'n (maybe before its over with but win7 gets buggy when i try, i had to turn it down to install it, its not a bad board, but my msi 7030 was more 64bit friendly