Oh yes the FX8350 is in the support list for the AsRock Extreme3.
Where were you looking PlasmaShadow.
970 Extreme3 R2.0
CPU Support List
* For cooling the CPU and its surrounding components, please install a CPU cooler with a top-down blowing design.
Socket Family Model Power Core Frequency FSB L2 Cache L3 Cache CPU Rev. Since BIOS
AM3+ Opteron 3300 OS3350HOW4KHK 45W Delhi 2800MHz 2000MHz 2MBx2 8MB C0 P1.60
AM3+ Opteron 3300 OS3320SJW4KHK 25W Delhi 1900MHz 1400MHz 2MBx2 8MB C0 All
AM3+ Opteron 3300 OS3380OLW8KHK 65W Delhi 2600MHz 2000MHz 2MBx4 8MB C0 All
AM3+ Opteron 3200 OS3280OLW8KGU 65W Zurich 2400MHz 2600MHz 2MBx4 8MB B2 All
AM3+* FX FD8370FRW8KHK 125W Vishera 4000MHz 2200MHz 2MBx4 8MB C0 P1.60
AM3+* FX FD837EWMW8KHK 95W Vishera 3300MHz 2200MHz 2MBx4 8MB C0 P1.60
AM3+* FX FD832EWMW8KHK 95W Vishera 3200MHz 2200MHz 2MBx4 8MB C0 P1.60
AM3+* FX FD8350FRW8KHK 125W Vishera 4000MHz 2200MHz 2MBx4 8MB C0 All < what`s this then ?
AM3+* FX FD8320FRW8KHK 125W Vishera 3500MHz 2200MHz 2MBx4 8MB C0 All
AM3+* FX FD8310WMW8KHK 95W Vishera 3400MHz 2200MHz 2MBx4 8MB C0 P1.60
AM3+* FX FD8300WMW8KHK 95W Vishera 3300MHz 2200MHz 2MBx4 8MB C0 P1.60
AM3+* FX FD8150FRW8KGU(BE) 125W Zambezi 3600MHz 2200MHz 2MBx4 8MB B2 All
AM3+* FX FD8140WMW8KGU 95W Zambezi 3200MHz 2200MHz 2MBx4 8MB B2 All
AM3+* FX FD8120FRW8KGU(BE) 125W Zambezi 3100MHz 2200MHz 2MBx4 8MB B2 All
AM3+* FX FD8120WMW8KGU(BE) 95W Zambezi 3100MHz 2200MHz 2MBx4 8MB B2 All
AM3+* FX FD8100WMW8KGU(BE) 95W Zambezi 2800MHz 2000MHz 2MBx4 8MB B2 All
AM3+* FX FD6350FRW6KHK 125W Vishera 3900MHz 2200MHz 2MBx3 8MB C0 All
AM3+* FX FD6300WMW6KHK 95W Vishera 3500MHz 2000MHz 2MBx3 8MB C0 All
AM3+* FX FD6200FRW6KGU 125W Zambezi 3800MHz 2200MHz 2MBx3 8MB B2 All
AM3+* FX FD6130FRW6KGU 125W Zambezi 3600MHz 2200MHz 2MBx3 8MB B2 All
AM3+* FX FD6120WMW6KGU 95W Zambezi 3500MHz 2000MHz 2MBx3 8MB B2 All
AM3+* FX FD6100WMW6KGU(BE) 95W Zambezi 3300MHz 2000MHz 2MBx3 8MB B2 All
AM3+* FX FD4350FRW4KHK 125W Vishera 4200MHz 2200MHz 2MBx2 8MB C0 All
AM3+* FX FD4320WMW4MHK 95W Vishera 4000MHz 2000MHz 2MBx2 4MB C0 All
AM3+* FX FD4300WMW4MHK 95W Vishera 3800MHz 2000MHz 2MBx2 4MB C0 All
AM3+* FX FD4200FRW4KGU 125W Zambezi 3300MHz 2200MHz 2MBx2 8MB B2 All
AM3+* FX FD4170FRW4KGU(BE) 125W Zambezi 4200MHz 2200MHz 2MBx2 8MB B2 All
AM3+* FX FD4150WMW4KGU 95W Zambezi 3900MHz 2000MHz 2MBx2 8MB B2 All
http://www.asrock.com/mb/AMD/970%20Extreme3%20R2.0/index.asp?cat=CPU
The Am3+ socket on the board can take a 125W cpu meaning it will work fine with the FX 8350 you have.
And the Vrms are up to the job or a 125W cpu part would not be quoted, listed or tested as working fine.