I have an older compaq presario v5207 running Celeron M 410 and 940GML. I've done some searching and people said that chipset supports Core Duo even though Intel says no. Then I checked the bios changelog for my model and it says support for Core Duo T2050 and T2250 added. So I guess its safe to say picking up a T2050 for $35 and 2 gig for $20 is a safe upgrade. Interestingly, the later bios says support for Core 2 Duo added. I thought Core and Core 2 use different sockets? I have 479 socket and was wondering if a Core 2 will work. Value wise Core 2 is a lot more expensive so I don't know if it is that much faster than its older brother.