Hi Guys Just wondering if i could ask for a little help and advice Got a bit of a problem, a friend of mine has bought a computer from somewere a good 3-4 years ago, he wanted a upgrade on his memory so asked if id help out, after opening it up i noticed its actually RIMM's inside so i set about trying to get hold of some, they are very expensive so said he would be better changing his motherboard The current socket is 423 so yesterday i went the computer fair to see if i could get a replacment board, after speaking to the man he explained that the 423 socket is now no longer in use and id need to buy a new system, after looking this up on the net i have seen that the 423 is now no longer in use and has been taken over by 478, i was wondering if a 423 chip can go into a 478 motherboard if i got one from somewere? Any advice on this subject would be very gratefully received guys Thanks Phil