Severely jagged graphics with Sapphire Radeon HD 4830

[zemongoose]

Hi,

This is my first time posting. I've installed the Sims 3 and there's a major problem with the graphics. I'm running a quad core AMD Phenom 9100c with 8 gigs of RAM. I recently installed a brand new Sapphire Radeon HD 4830 with the latest drivers (along with a 585 watt power supply). I've tried running the game on its lowest settings to no avail.

In desperation, I tried playing the game using the onboard graphics (ATI Radeon HD 3200) and while the graphics work fine, the game runs significantly slower.

My non-EA games (most recently MLB2K9) work great with my 4830, so I don't think the video card is defective.

I've attached a screenshot. Any help would be greatly appreciated.

[Kolipoki]

All though what i;m about to say doesn't seem to bother my video card because it doesn't fall under it and still works, the sims 3 read me files say these are supported video cards of which the 4830 isn't on it

Windows Supported Video Cards
-----------------------------

NVIDIA GeForce series
FX 5900, FX 5950
6200, 6500, 6600, 6800
7200, 7300, 7600, 7800, 7900, 7950
8400, 8500, 8600, 8800
9300, 9400, 9500, 9600, 9800
G100, GT 120, GT 130, GTS 150
GTS 250, GTX 260, GTX 280, GTX 285, GTX 295

ATI Radeon(TM) series
9500, 9600, 9800
X300, X600, X700, X800, X850
X1300, X1600, X1800, X1900, X1950
2400, 2600, 2900
3450, 3650, 3850, 3870
4850, 4870

Otherwise, have you installed the current driver?

[callistra]

If the 4850 works there's no reason the 4830 wouldn't. I would check temps and update drivers.