myuusmeow said:
I got a 9800GT and have been loving it. L4D2 @ all highest, 1280x1024, 16x anisotropic, 8xAA, looks great. IIRC 4670 is around the 9800GT in performance.
The 4670 is meant to compete with the 9500GT. It's no where near the performance of a 9800GT. The Radeon HD 4850 is a closer competitor to the 9800GT.
On lower resolutions the 4670 should perform okay, you may have to turn settings down. If you can get the 4850 I would recommend it more.