NGX, sorry for being a bit frustrated but every other day or so someone asks a hardware question about something that I've spent hundreds of hours on myself (especially many, many Crossfire/SLI and multi-monitor setups for various flight simulators), and there is always a short, quick answer from you that says "that does not work" or "it will not make any difference" and other strange "facts".Anyway, for people who are actually interested in the OP's question and SLI/multimonitor or 32 vs 64 bit etc, I'd recommend the hardware forum since these issues have been discussed extensively there many times and it's not really specific to the 737NGX.A good thread comparing graphics card performance in FSX is http://forum.avsim.net/topic/320755-480-gtx-vs-580-gtx/. It's from someone who has actually taken the time to test a lot of stuff himself and present solid numbers. How about that.

If you have 3 GPUs wih bridges to push one image across 3 monitors okay that is SLI. If you have 3 GPUs and 3 different images on the monitors that is not SLI.

Yes, three GPU's one image at 5760x1080 so SLI. Scott Gist

There's a big difference since the VAS limit in 32 bit is just 2GB (3GB with the switch) as opposed to 4GB in a 64b OS

Not all 64 bits are decoded into virtual address space on current processors and x64 Windows supports that by allowing only the 44 LSBs of the 64 to be used. This equates to an ability to map VAS up to 16TB. I don't for one minute think that you meant to write 4GB in your post above. Andrew Vincent

Not all 64 bits are decoded into virtual address space on current processors and x64 Windows supports that by allowing only the 44 LSBs of the 64 to be used. This equates to an ability to map VAS up to 16TB. I don't for one minute think that you meant to write 4GB in your post above. Andrew Vincent

I meant 4GB for 32b apps (like FSX) obviously.