Dell Precision 380 with Intel 975X, Core 2 Duo Possible?

I checked the specs through Intel on my mainboard and according to the site, this board can run Core 2 Duo Extreme processors. I think I have a 390 chipset in my 380 model (weren't most 950 or 960 chipsets?). How can I check to see if I can upgrade? Intel seems to indicate that the upgrade path is there, but did Dell lock them out with the BIOS? I have 2 P4 3.46EE processors in there now with 4GB RAM. I think this system would scream with 2 Core 2 or quad core processors! Still fast for a system that is 3 years old, but I do a lot of high end work and am seeing some drag in HD video edits). Thanks!

According to the Intel Chipset ID Utility, it is a 975X Express Chipset with an 82801GR Controller, however, the cpuz identifies it as a Dell 0XH407. I'm sure that means that Dell has locked the BIOS and is limiting the processor. All the other Precision 380's I have seen had the 955 and 965 chipsets and the Precision 390 was advertised as having the new 975 chipset, so mine doesn't fit the 380 specs.

Thanks!