Adding 1GB DDR2 SDRAM to MacBookPro

Hi,

I've got a 15"MacBookPro running Mac OS X 10.4.11 with 1GB DDR2 SDRAM, and I'm interested in adding another 1GB in the remaining slot. This is to try to cheaply increase performance when simultaneously running apps like Photoshop, Illustrator, Powerpoint, etc, which my pro seems to have trouble doing. My question is, would it be OK to add another 1GB into the empty slot without removing the existing preinstalled 1GB if I get the new 1GB from an outside vendor such as Newegg or Crucial? Or, is it necessary to have both slots carry RAM from the same vendor (ie. replace the preinstalled RAM with new 1GB for each slot)? Thanks,

TheCount723

 

compatibility of preinstalled RAM with 3rd party RAM for MBP1,1

Thank you-- I've got a MacBook Pro1,1 which I think can only support up to 2GB of RAM in total. Otherwise I would definitely go for the 4GB.

I continue to read in various places that it would be better to take out the existing, preinstalled 1GB that I've got, and replace it with two new 1GB (2X1GB) DDR2 SDRAM, such that the brand is exactly the same in both slots. Any know if this actually matters?

Also, since the preinstalled 1GB SDRAM on the MBP1,1 runs at 667 MHz, do I need to buy the new 1GB of RAM to run at 667MHz, or is it possible for this Bus on the MBP1,1 to "read" 800MHz?

 

It's definitely got 1x1GB, only one slot is being used, the other slot is empty. It was dumb to leave the other slot empty for this long.