Quad Core for GA-M61VME-S2

Hello guys,

I have a GA-M61VME-S2 Rev 1.0 mb with F11c bios version.
It's an AM2 motherboard that supports few AM2+ cpus thanks to latest bios.
The best cpu it can support is a triple core phenom 2,3 Ghz.
I would like to use a quad core (phenom x4).
It supports phenom core stepping up to B2.
The only quad core that uses this core stepping is a AMD Phenom X4 9600, but i have no problem supporting a stronger cpu if possible.

Here is BIOS download page:
http://www.gigabyte.com/products/product-page.aspx?pid=2381#bios

Thanks a lot.