Because RAM comes in different speed ratings, your new motherboard may be able to use your old RAM, but it may not run as quickly as the system is capable, so you’d be shortchanging yourself. Be sure to look at the specs on whatever motherboard or system you choose to make sure you buy the fastest possible RAM that will work with your PC. If you are buying a PC from a company like Dell or HP, check the system specs of the machine to determine what RAM is needed. Sites like Crucial.com will let you look the computer up by model number, which greatly helps.
For more advice and guidance on RAM, CPU & Motherboards visit the CPU, Graphics & Memory catalog.