DDR2 667 work in DDR2 533 slot?

[ishould]

My motherbaord suports up to DDR2 533, but can I plug in a stick of DDR2 667 and it'll just run at 533? I'm thinking of upgrading the motherboard in the future so I'd rather get 667

 

[Ycon]

Should work, but if your computer wont boot, then youve got a problem

 

[The_OGS]

Yes, good thinking - I would never buy PC2-4200!
PC2-5400 is still inexpensive, and will work fine.
Ideally you would pickup PC2-6400 (800MHz) if you were thinking about the future.
It will also work fine @ 533MHz - really fine in fact :^)
My Corsair PC2-6400 has special SPD settings, that kick in below 270MHz (or ~540DDR) to apply much tighter memory timings @ DDR533 speed.
Regards