Ram Question

[johnw]

Hi, this is the first time im going to be getting a new stick of ram for my HP 734n (has 512mb right now) I'm considering getting this Kingston Technologies 512MB DDR SDRAM Desktop Memory (KVR400AK2/512R)

Just wondering if it would be compatiable with my current ram. If anybody has some suggestions or tips i should know before purchasing this ram please let me know.