Can you mix & match RAM with different timings?

[zaphox]

I have a HP system which uses 2 * 1GB PC2-6400-666 RAM and want to buy another 2 GB.

I can't find any 666 timing RAM under Scan's DDR2 PC6400 (800Mhz) range, they all use 555 timing.. like this one: http://www.scan.co.uk/products/02gb-...d-cas-5-5-5-18

Will I run in to problems if I mix & match these 2 types of RAM with different timings in the same system?

[scaryjim]

You shouldn't have any problems, the motherboard should set all the ram to use the slowest common settings, so it'll run all of the RAM at 6-6-6. Probably best to go in to your BIOS after you install the new RAM and check though - you can always manually set the timings if the motherboard doesn't get it right automatically

[zaphox]

Ok thanks for the advice

[Pob255]

Quick note, Check you have free slots, many systems only have 2 slots, if so then you'd have to replace the existing ram.