My girlfriend has an old Dell Inspiron 5150 with 256mb or ram. According to Crucial's memory configurator, it should take 200 pin,ddr pc2700 sticks. I have a pair of 512 mb 200 pin, ddr2 pc4200 sticks left over from upgrading my laptop. Does anyone know if it would be ok to put these in her notebook? The best case scenario that I can think of is that they would work, but the clock speed would be ratcheted down to match what her machine can work with.