hi all, i have a hp pavilion dv1659us notebook and want to upgrade the cpu, currently i have a t2300 1.66ghz 667mhz cpu and i bought a t2450 2ghz 533mhz cpu to put in but before i do i was thinking on going higher, just cause the switch would lower the fsb speed, processers i have been looking at are the t2600 and the t2700, what im not sure of is the stepping, my current stepping is C0 but the t2700 shows D0, does it make a differance? my socket (according to cpuz) is "Socket 479 mPGA", also if i added a cpu that supports 64bit os, would i be able to upgrade my ram to 4gb? hp's site shows that the max i can put in is 2gb but is that because it is limited to the pre-installed cpu? if anyone needs any further information please ask, thanks