What chipset does Dell Inspiron 546 MT have?

Does anyone know what chipset is on the Dell Inspiron 546 MT with an AMD Phenom X4 810 2.6GHz 6MB?

When I use 'Belarc Advisor' I get:

Main Circuit Board
Board: Dell Inc. 0F896N A03
Serial Number: ..CN7360499S00BC.
Bus Clock: 200 megahertz
BIOS: Dell Inc. A11 01/19/2010

What is this "Dell Inc. 0F896N A03"?
(I got some issues sync'ing my iphone and I want to find out what the problem is; it seems to be some hardware issue probably in combination with W7).

Thanks.

Michiel