Mixing PC2-4200 and PC2-5300 on a Dell Inspirion 6400 Tags: Memory Notebooks RAM Dell Last response: May 26, 2007 5:12 AM in Memory Share zoromax May 25, 2007 1:21:39 PM Hi, I just bought a Dell Inspirion 6400 notebook computer that came with 2X 512MB PC2-4200 RAM. I just saw a good deal in Newegg for 1GB-PC2-5300. I have a few quesitons: 1. Can I just remove one of the 512MB PC2-4200 from the notebook and add the 1GB-PC2-5300 so I get 1.5G of RAM? 2. Will this hurt the performance since the MHZ is different being that PC2-4200 is 533 and PC2-5300 is 667? Thanks a lot in advanced! More about : mixing pc2 4200 pc2 5300 dell inspirion 6400 Mondoman May 25, 2007 5:04:15 PM 1) Yes, that should work. 2) No, the RAM you are buying is *rated* at DDR2-667, but the computer will run all installed memory at the same speed, chosen to be compatible with all installed memory (in your case the speed should be DDR2-533). zoromax May 26, 2007 5:12:04 AM Great! Thanks for the answer! Can't find your answer ? Ask ! Publish Related resources computer uses PC2-5300, would like to use PC2-4200, or PC2-6400, which would be safest? Forum DDR2 PC2-4200 mix with PC2-6400 Forum More resources Read discussions in other Memory categories Compatibility DDR2 DDR3 Dual Channel RAM Corsair G.SKILL !