I have an old 4700C desktop, and I wanted to upgrade the processor.  The Bios is A07, which looks to be the highest upgrade for this motherboard.  I know the dell website says A10, but that only seems to apply to the 4700.  The 4700C will not allow me to go to BIOS A10.  So, that's my first problem.  Is anyone running A10 in their 4700C?  If so, how'd you do it?

In the manual I read that the max processor is a P4 570, but I think a P4 571 would would work.  The advantage being a 64bit processor versus a 32bit processor.  Does anyone know if the 5x1 series will work in the 4700C?  I've even read a lot of conflicting information about running 6x series in the 4700.  Intel says it will, but I get a lot of conflicting information on the 4700 series as far as upgrading processors goes.  My guess is the cache memory is probably the most critical, where the board specs 1mb of L2 max. 

I currently run 4gb of ram, which is the max spec on the machine.  Running a 32bit OS, I obviously lose a little of that memory.  The 915G chipset is 8gb capable though, so if I can get to a 64bit processor, does anyone know if I can put a 4gbx2 memory configuration in?

Of course, I should probably put all my money towards something else, but I'm having fun with this old clunker.  I'm running Kubuntu and it does a pretty good job with it.