Had same problem as well. First of all here are my specs: AMD/ATi 4870 HD (512MB) (Latest Catalyst 9.1 drivers) Intel Core2Duo E7300 @ 2.66GHz 4GB DDR2 PC26400 RAM Asus Xonar DX I did experience some harsh lag problems with SC4. Then I turned towards the imagecfg program where you can set any software to run 1,2,3,4 etc cores. I force SC4 to run 1 core. Game ran ok, but not by a lot. So then I switched to Software from Hardware render and the game now runs fine. And I also have all the settings maxed out as well. But as for running in Hardware mode, I just think SC4, even with the latest patch, will refuse to recognize and PCIe card properly. On ym older ADP system, SC4 ran fine in Hardware render mode. That older system had a GeForce FX 5700 LE. Note: I am running SC4 unpatched. EDIT: When in Hardware render mode, I DID NOT get any graphical artifacts whatsoever, just really laggy. And the Resolution I am playing at right now is 1600 x 1200. EDIT2: Whoops, I di have the game patched to .638. My bad. So yeah, I do have it patched up.
