You are welcome to try yourself, but trust me you could have a Tri/Quad Nvidia 8800 Ultra and it would make next to bugger all difference on the result other than your room being more than a tad warmer

I'll have you no that my computer heats up the room it is in by 5 degree's C
From room temp, to 30 degree's after 3 hours of Crysis gaming haha. But I suppose being in a cupboard doesnt help
Depends... how much memory you got?
Its not dependent on system memory
based on my beta4 tests, its the game engine thats the limiting factor.
I have 8GB RAM btw and SoaSE has never used more than 1.2GB even with 25,000 ships.
Thats really good, Sins use's upto 2GB ram for me, and im limited to 1.5 of actual ram, Then my Harddrive gets raped because it use's page file (Stupid Microsoft!)
Also, say someone stupid enough like myself wanted to raise my room temp by a further 5 degree's, how would he go about raising the ships cap?