You will sadly be limited to only 2GBs if you run SLI. You may need to run the 4GB card as the primary card and then use SLI only in apps that support it. I don't know what kind of perf gain or loss you will experience though.
Thanks, I might need to send back the 2 GB card then and replace it with another 4 GB GT 730. I only got the 2 GB DDR5 card because it's made by a reputable manufacturer- EVGA- the only one who makes the 4 GB DDR5 card is Zotac- and I'm unsure of how good they are. Would SLI be a great benefit in SE, Doc?
I have multiple monitors so I could possibly forego SLI and just run everything in "surround mode" with one screen hooked up to the 4 GB card and the other one hooked up to the 2 GB card, no? And then run SE on the screen hooked up to the 4GB card?
I don't believe you can run SLI with multiple monitors anyway, you have to run them in "surround" mode if you want to use both monitors separately.