I have a acer travelmate 2420.
CPU: Celeron M 380 (1.65 Ghz,400 FSB, 1MB L2 cache)
RAM: 256 DDR2 (444 Mhz)
Q: I want to know which DDR2 ram is compatible with CPU, 1024 MB DDR2(533) or 1024MB(667 MHz).
generally you can go to a couple higher speeds with your ram
depends on the mobo
usually Crucial mem finder is reliable
but calling tiger direct and ask their customer service (they are pretty good)
dont have to buy from them
can just find out info