800MHz RAM Being Reported As 667MHz

by on November 22, 2007

Q: I have a Dell XPS M1730 with a 2.8GHz Intel Core 2 Duo Extreme processor and 4GB of 667MHz speed RAM running Windows Vista Business. I recently changed my RAM to 800MHz but in the BIOS it only displays 667MHz, is there any way to unlock this on Dell XPS laptops?

A: I have some bad news for you. According to the Dell XPS M1730 Owner’s Manual, the maximum supported RAM speed for your system is 667MHz. This means that that 800MHz RAM will never be recognized as 800MHz by your computer unless you overclock your computer’s front side bus. Overclocking is highly technical and often has unpredictable results. It may also void any warranty that you may for your computer. I do not recommend it.

Wikipedia has a List of Intel chipsets and it does an excellent job of explaining which chipsets from Intel support 800MHz speed RAM. Please note that chipsets are not the same as processors! Consider keeping the 800MHz RAM in your system anyway. You can always use it in another computer later on.