Yes, I'm using Optifine. Yes, I'm using the most up-to-date graphics drivers for my card. I don't know what the problem is here. I get ~30-40FPS but the game stutters horribly, especially when loading new chunks. It's an Inspiron 530s, and it doesn't have the best specs, but it should be able to handle Minecraft.
Intel Celeron 420 1.6GHz
2GB DDR2 RAM
120GB SATA Hard Drive
Integrated Intel G33/G31 Express
Windows 7 Ultimate
Intel Celeron 420 1.6GHz
2GB DDR2 RAM
120GB SATA Hard Drive
Integrated Intel G33/G31 Express
Windows 7 Ultimate