Check your computer's RAM cards. On them should be a serial number. Punch that number into a search engine (probably on someone else's computer since you need to open up your own) and see what type of system memory you have.
DDR3 is very common in newer computers, so having DDR2 memory may be your problem.
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Check your computer's RAM cards. On them should be a serial number. Punch that number into a search engine (probably on someone else's computer since you need to open up your own) and see what type of system memory you have.
DDR3 is very common in newer computers, so having DDR2 memory may be your problem.