The 6400 is slightly faster, but only if your board supports it. Some older boards run at pc5300 speed, but the faster ram may work at the slower speed.
Thank you ! I bought an old PC to run my Xp programs until XP goes the way of all good things.
Thank you very much!
matching parts is a mystery to me,I don't want to mess up.
Computers are delicate creatures rubbing your socks on the carpet can kill them?