The memory RAM on my G4 is PC2600...

Hi I need some help, I got a 1.25GHz Power Mac G4, the first time it have 256mb of memory RAM, so I decide to get another dimm of 512mb, now I need more RAM memory and when I was checking the prices I realize that all powermac g4 of 1.25ghz comes with PC2700 (the speed of the memory) and the first that comes with it original was PC2600, the second one its PC2600 (because I bought it looking at the other one)...

So do you know if I can mix dimms PC2600 with PC2700? The problem is that I can find dimms of PC2600 any more.

Thanx!! Relay appreciate your help!