I I have an old gx620 ultra small form factor that I'd like to upgrade because it fits perfectly where it is and I haven't found any more modern unit that does. It has a pentium d820-2.8 ghz,800 mhz and I would like to go to a core 2 duo (e5200-e5800) if possible. I know it would fit physically but would this mobo support it? I have a gateway that can run both chips but I don't have a clue about the dell. I know it should run cooler, and that should quiet it down- the fan runs hard and loud when it has to start working. If no on the e series then how high can I go on the pentium d series chips? I know the d945 would be a good bit quicker, but again, will this mobo support it? Thanx for any info you may have.