Yes. Make sure your processor FSB is correct, it will be 133mhz for DDR266, 166mhz for DDR333 and 200mhz for DDR400. You can fit faster memory in a slower system with no problem, but not the other way round. Better explanation here; click here
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New iPad, iPhone SE & Red iPhone 7 on sale now
Synology invites you to visit them at Insomnia on 26th – 29th August. Book your tickets now and visit Synology.