Need suggestions

[idata]

I use Solidworks 2009, AnSYS fea software, mathlab, Pro Engineer, Surfcam and Mastercam and 3dsmax, and Maya. I want a dual processor slot board with min 16 gigs ram and want to run windows XP. Is 64 bit backward compatible with 32 bit software? Can I run 32 bit software on a 64 bit system?

I also need for 2 idential sli enabled pci express slot for my dual Quadro FX3700 sli linked cards I have. I would also at a later time like to use the Tesla card and the PCI card from Texas Memory Systems RamSan-20 card. I also need this board to support solid state hd's.

Which mb from Intel would work?

[idata]

Yes, most 32-bit software runs fine on 64-bit. I would personally avoid XP 64-bit though, less driver support and such. Vista x64 is much better, even go Win7/Server2008-R2 is great.

I would recommend a Xeon 5500 series board like

http://www.intel.com/products/server/motherboards/S5500BC/S5500BC-overview.htm http://www.intel.com/products/server/motherboards/S5500BC/S5500BC-overview.htm