i have run Solid works on a variety of Nvidia cards that were not approved. The last was a low end out of spec PC with an 8800 series card. Yes it ran slow and I was not be able to build really large assemblies without it freezing nor did I get the crisp lines and smooth shading that solid works is capable of, but if that set up will run 09 I would guess it will do fine on the 280 card with a decent processor. I will soon find out as I am configuring an HP with the same card to run SW.
Jimbo