Here Transcend 1GB/400MHz which is one sided module works perfectly.
Unfortunatelly i have only one module of rhis.
I tried Kingmax 1GB/400MHz doule sided, which is not worked in pair. So only one module works at a time.
I will try to check with one sided modules. Somewhere i read peg one is like only one sided modules, maybe this is for true for peg2.
MorphOS PowerBook G4 1,67GHz, 2GB Ram, 250GBHdd, ATI 9700/128MB
Morphos G5 2,7GHz, 8GB Ram, 500GB Hdd, ATi Passive cooled 9800 PRO/128MB