Page 26 of the online manual lists your BIOS options in regards to clocking.
I assume you have the book?
If not you need to search your motherboard here (they do not offer direct links):
Foxconn - Support - Downloads
The CPU multiplier is the rate that the FSB is multplied.
Your CPU_Z shows a bus of 200 x 8 = 1600
Why the FSB is 200 I don't know. That appears strange.
On re-thought I would try to up the FSB. The manual shows you where these setting are and how to change them.
I also would search the CPU compatibility list:
Foxconn - Products: Motherboard
Which gives us:
Foxconn Support - CPU Support List
Yours appears as the last listed model.
I would suggest trying to contact Foxconn and if they cannot help try AMD.
FOXCONN Channel Service _ Contact Us
AMD.com | Support & Downloads