Check the information on the website of the manufacturer of the MoBo.
When you find information of the usable RAM u can use it without problems... (I think)

Lookup these information:
Chip / Modul
DDR2-400 / PC2-3200
DDR2-533 / PC2-4200
DDR2-667 / PC2-5300
DDR2-800 / PC2-6400
DDR2-1066 / PC2-8500