U mean your Corsair xms??
895Mhz timing is wht for now?? Try feed some vDimm

If they're new then you should go back to the shop and demand a replacement or refund. How the hell can a shop sell ppl faulty stuff (unless the buyer us buying with understanding that its faulty)? Not stable at stock means faulty,  apa lagi if not working.

And yes, lifetime warranty is pretty much standard these days, there's no reason to skimp and get anything less.

Basically, most Micron D9s should be able to do DDR2 800 with ease.