Question on adding RAM to MSI K7T66 Pro mobo

[algae]

Hi all,
This mb currently has two sticks of 256 mb PC2700 DDR Ram in it. I have a spare slot and due to a recent problem with memory I have emerged with a spare 256 mb PC2100 DDR. Can I add it to the mix?
Tia for any info.

Gary

 

[ribbon13]

Bad idea. All the ram will clock down to 2100