Sticks (RAM) and system packages differ from person to person.
Im sure everyone reading this knows, you have to take in account for your power supply, CPU, and PCI/USB devices when oc'ing your FSB.
Personally I believe I have a lucky stick of Mushkin PC2400.
I have been able to oc this to 165 CAS 2 stable running SETI 24/7.
I dropped this to 160fsb with a x 10 for a 1.6ghz because I dont have cash to replace this stick just yet. @ 165 even thou its stable, its bound to die sooner than at 160.
I have heard of people only being able to get this stick to 155 CAS2 before lockups.
The only mod i have done is adding a nice cooling solution to my North Bridge.
Also I dont run any USB devices.
Ihave a 1.4 T-Bird with an SK-6 on it.
The case is much to loud for now, Im looking into peltiers at the moment, to get rid of some noise. Or maybe even lining the inside of my case with Dynomatt.