945 Board.. I think you mean DDR2...
Depends which proccy ur hooking it up with....
Also, Do you need the Proccy for the LGA775 Socket, for the 945 Board? Or for any platform?
If for the 945 Chipset, LGA 775, then id guess Pentium D920/930/940...
DDR2-533 Value Select 2 GB, are available here. Not sure about higher end DDR2-667/800