I have a Dell Dimension 4550 400 MHz computer with 256MB DDR PC2700. I purchased another 256MB DDR PC2700U & 333MHz. My computer will not start up. I had to remove the new memory chip. Is there a difference in the PC2700 and the PC2700U or is it the two different MHZ? Or both?
Thanks for any help,
Dee
Thanks for any help,
Dee