by right type you are saying what exactly?

i was looking to go to from ddr2 200 pin sodimm to ddr2 200 pin sodimm.

i am unable to find if my laptop motherboard supports 6400, but i do know that it has 2x512mb paired chips. i've already used the crucial tool, but newegg.com has a 2gb 6400 kit for less than the 5300 kit. will i encounter problems if i go this route, or will the memory clock speed just set itself to what the laptop mobo can handle?

TIA!