I'm helping a relative of mine with computer maintenance. She has a Compaq Presario 5000 (10yrs old) and it's slow. My first thing was to look at the memory -- it has only 512MB, but its maximum memory is 768MB. Crucial.com shows that it takes non-ECC SDRAM memory.
Staples has 256MB SDRAM ECC memory. Can I buy an ECC SDRAM, or do I have to buy non-ECC SDRAM?