CPU upgrade for a Gateway 7405GX 939 socket

[wannabgeek2]

I have a older gateway 7405GX laptop with a 939 socket. I can not find any info on what is the limits for upgrading the cpu . Will it handle a 4200+ dual core or will I have to stay with a 3800+ single core or even lower cpu?

 

[lonewolf7]

http://www.tomshardware.com/forum/221613-28-best-fastest-socket