Any DDR over 3200 (400MHz) is not certified to work with Intel mobos. That's not to say that it won't work, but Intel mobos don't give you any options to alter jumpers to allocate more voltage to your RAM.
DDR 3500 and above usually require more voltage if you want them to run stable, so your best bet is to max out at 3200 RAM with Intel mobos.
I have the D875PBZ mobo using Mushkin 3500 L2 RAM, but I had to manually set the RAM back to 2-3-3-6 timings to get it to run stable with my mobo because the RAM is too fast for it.