My board is wolfdale 1333-d667 if i instal memory pc800 it is compatible or not

◦Supports Dual Channel DDR2 667/533 x 2 DIMM slots with max. capacity up to 4GB

You can put DDR2 800mhz in but it will only run it at 667mhz. 2gb sticks max, 2 slots, 4 total. This board will not run DDR3

thanks you so much